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authorLinus Torvalds <torvalds@linux-foundation.org>2016-07-26 15:03:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-26 15:03:07 -0700
commitd05d7f40791ccbb6e543cc5dd6a6aa08fc71d635 (patch)
treedc0039fe490a41a70de10d58fe8e6136db46463a /block
parent75a442efb1ca613f8d1cc71a32c2c9b0aefae4a5 (diff)
parent17007f3994cdb4643355c73f54f0adad006cf59e (diff)
downloadlinux-stericsson-d05d7f40791ccbb6e543cc5dd6a6aa08fc71d635.tar.gz
Merge branch 'for-4.8/core' of git://git.kernel.dk/linux-block
Pull core block updates from Jens Axboe: - the big change is the cleanup from Mike Christie, cleaning up our uses of command types and modified flags. This is what will throw some merge conflicts - regression fix for the above for btrfs, from Vincent - following up to the above, better packing of struct request from Christoph - a 2038 fix for blktrace from Arnd - a few trivial/spelling fixes from Bart Van Assche - a front merge check fix from Damien, which could cause issues on SMR drives - Atari partition fix from Gabriel - convert cfq to highres timers, since jiffies isn't granular enough for some devices these days. From Jan and Jeff - CFQ priority boost fix idle classes, from me - cleanup series from Ming, improving our bio/bvec iteration - a direct issue fix for blk-mq from Omar - fix for plug merging not involving the IO scheduler, like we do for other types of merges. From Tahsin - expose DAX type internally and through sysfs. From Toshi and Yigal * 'for-4.8/core' of git://git.kernel.dk/linux-block: (76 commits) block: Fix front merge check block: do not merge requests without consulting with io scheduler block: Fix spelling in a source code comment block: expose QUEUE_FLAG_DAX in sysfs block: add QUEUE_FLAG_DAX for devices to advertise their DAX support Btrfs: fix comparison in __btrfs_map_block() block: atari: Return early for unsupported sector size Doc: block: Fix a typo in queue-sysfs.txt cfq-iosched: Charge at least 1 jiffie instead of 1 ns cfq-iosched: Fix regression in bonnie++ rewrite performance cfq-iosched: Convert slice_resid from u64 to s64 block: Convert fifo_time from ulong to u64 blktrace: avoid using timespec block/blk-cgroup.c: Declare local symbols static block/bio-integrity.c: Add #include "blk.h" block/partition-generic.c: Remove a set-but-not-used variable block: bio: kill BIO_MAX_SIZE cfq-iosched: temporarily boost queue priority for idle classes block: drbd: avoid to use BIO_MAX_SIZE block: bio: remove BIO_MAX_SECTORS ...
Diffstat (limited to 'block')
-rw-r--r--block/bio-integrity.c1
-rw-r--r--block/bio.c20
-rw-r--r--block/blk-cgroup.c4
-rw-r--r--block/blk-core.c96
-rw-r--r--block/blk-exec.c2
-rw-r--r--block/blk-flush.c23
-rw-r--r--block/blk-lib.c31
-rw-r--r--block/blk-map.c2
-rw-r--r--block/blk-merge.c36
-rw-r--r--block/blk-mq.c42
-rw-r--r--block/blk-sysfs.c11
-rw-r--r--block/cfq-iosched.c432
-rw-r--r--block/deadline-iosched.c7
-rw-r--r--block/elevator.c29
-rw-r--r--block/partition-generic.c3
-rw-r--r--block/partitions/atari.c7
16 files changed, 434 insertions, 312 deletions
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 711e4d8de6fa..15d37b1cd500 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -26,6 +26,7 @@
#include <linux/bio.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
+#include "blk.h"
#define BIP_INLINE_VECS 4
diff --git a/block/bio.c b/block/bio.c
index 0e4aa42bc30d..848cd351513b 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -656,16 +656,15 @@ struct bio *bio_clone_bioset(struct bio *bio_src, gfp_t gfp_mask,
bio = bio_alloc_bioset(gfp_mask, bio_segments(bio_src), bs);
if (!bio)
return NULL;
-
bio->bi_bdev = bio_src->bi_bdev;
bio->bi_rw = bio_src->bi_rw;
bio->bi_iter.bi_sector = bio_src->bi_iter.bi_sector;
bio->bi_iter.bi_size = bio_src->bi_iter.bi_size;
- if (bio->bi_rw & REQ_DISCARD)
+ if (bio_op(bio) == REQ_OP_DISCARD)
goto integrity_clone;
- if (bio->bi_rw & REQ_WRITE_SAME) {
+ if (bio_op(bio) == REQ_OP_WRITE_SAME) {
bio->bi_io_vec[bio->bi_vcnt++] = bio_src->bi_io_vec[0];
goto integrity_clone;
}
@@ -854,21 +853,20 @@ static void submit_bio_wait_endio(struct bio *bio)
/**
* submit_bio_wait - submit a bio, and wait until it completes
- * @rw: whether to %READ or %WRITE, or maybe to %READA (read ahead)
* @bio: The &struct bio which describes the I/O
*
* Simple wrapper around submit_bio(). Returns 0 on success, or the error from
* bio_endio() on failure.
*/
-int submit_bio_wait(int rw, struct bio *bio)
+int submit_bio_wait(struct bio *bio)
{
struct submit_bio_ret ret;
- rw |= REQ_SYNC;
init_completion(&ret.event);
bio->bi_private = &ret;
bio->bi_end_io = submit_bio_wait_endio;
- submit_bio(rw, bio);
+ bio->bi_rw |= REQ_SYNC;
+ submit_bio(bio);
wait_for_completion_io(&ret.event);
return ret.error;
@@ -1167,7 +1165,7 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
goto out_bmd;
if (iter->type & WRITE)
- bio->bi_rw |= REQ_WRITE;
+ bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
ret = 0;
@@ -1337,7 +1335,7 @@ struct bio *bio_map_user_iov(struct request_queue *q,
* set data direction, and check if mapped pages need bouncing
*/
if (iter->type & WRITE)
- bio->bi_rw |= REQ_WRITE;
+ bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
bio_set_flag(bio, BIO_USER_MAPPED);
@@ -1530,7 +1528,7 @@ struct bio *bio_copy_kern(struct request_queue *q, void *data, unsigned int len,
bio->bi_private = data;
} else {
bio->bi_end_io = bio_copy_kern_endio;
- bio->bi_rw |= REQ_WRITE;
+ bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
}
return bio;
@@ -1785,7 +1783,7 @@ struct bio *bio_split(struct bio *bio, int sectors,
* Discards need a mutable bio_vec to accommodate the payload
* required by the DSM TRIM and UNMAP commands.
*/
- if (bio->bi_rw & REQ_DISCARD)
+ if (bio_op(bio) == REQ_OP_DISCARD)
split = bio_clone_bioset(bio, gfp, bs);
else
split = bio_clone_fast(bio, gfp, bs);
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 66e6f1aae02e..dd38e5ced4a3 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -905,7 +905,7 @@ static int blkcg_print_stat(struct seq_file *sf, void *v)
return 0;
}
-struct cftype blkcg_files[] = {
+static struct cftype blkcg_files[] = {
{
.name = "stat",
.flags = CFTYPE_NOT_ON_ROOT,
@@ -914,7 +914,7 @@ struct cftype blkcg_files[] = {
{ } /* terminate */
};
-struct cftype blkcg_legacy_files[] = {
+static struct cftype blkcg_legacy_files[] = {
{
.name = "reset_stats",
.write_u64 = blkcg_reset_stats,
diff --git a/block/blk-core.c b/block/blk-core.c
index 2475b1c72773..3cfd67d006fb 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -959,10 +959,10 @@ static void __freed_request(struct request_list *rl, int sync)
* A request has just been released. Account for it, update the full and
* congestion status, wake up any waiters. Called under q->queue_lock.
*/
-static void freed_request(struct request_list *rl, unsigned int flags)
+static void freed_request(struct request_list *rl, int op, unsigned int flags)
{
struct request_queue *q = rl->q;
- int sync = rw_is_sync(flags);
+ int sync = rw_is_sync(op, flags);
q->nr_rqs[sync]--;
rl->count[sync]--;
@@ -1029,7 +1029,7 @@ static bool blk_rq_should_init_elevator(struct bio *bio)
* Flush requests do not use the elevator so skip initialization.
* This allows a request to share the flush and elevator data.
*/
- if (bio->bi_rw & (REQ_FLUSH | REQ_FUA))
+ if (bio->bi_rw & (REQ_PREFLUSH | REQ_FUA))
return false;
return true;
@@ -1054,7 +1054,8 @@ static struct io_context *rq_ioc(struct bio *bio)
/**
* __get_request - get a free request
* @rl: request list to allocate from
- * @rw_flags: RW and SYNC flags
+ * @op: REQ_OP_READ/REQ_OP_WRITE
+ * @op_flags: rq_flag_bits
* @bio: bio to allocate request for (can be %NULL)
* @gfp_mask: allocation mask
*
@@ -1065,21 +1066,22 @@ static struct io_context *rq_ioc(struct bio *bio)
* Returns ERR_PTR on failure, with @q->queue_lock held.
* Returns request pointer on success, with @q->queue_lock *not held*.
*/
-static struct request *__get_request(struct request_list *rl, int rw_flags,
- struct bio *bio, gfp_t gfp_mask)
+static struct request *__get_request(struct request_list *rl, int op,
+ int op_flags, struct bio *bio,
+ gfp_t gfp_mask)
{
struct request_queue *q = rl->q;
struct request *rq;
struct elevator_type *et = q->elevator->type;
struct io_context *ioc = rq_ioc(bio);
struct io_cq *icq = NULL;
- const bool is_sync = rw_is_sync(rw_flags) != 0;
+ const bool is_sync = rw_is_sync(op, op_flags) != 0;
int may_queue;
if (unlikely(blk_queue_dying(q)))
return ERR_PTR(-ENODEV);
- may_queue = elv_may_queue(q, rw_flags);
+ may_queue = elv_may_queue(q, op, op_flags);
if (may_queue == ELV_MQUEUE_NO)
goto rq_starved;
@@ -1123,7 +1125,7 @@ static struct request *__get_request(struct request_list *rl, int rw_flags,
/*
* Decide whether the new request will be managed by elevator. If
- * so, mark @rw_flags and increment elvpriv. Non-zero elvpriv will
+ * so, mark @op_flags and increment elvpriv. Non-zero elvpriv will
* prevent the current elevator from being destroyed until the new
* request is freed. This guarantees icq's won't be destroyed and
* makes creating new ones safe.
@@ -1132,14 +1134,14 @@ static struct request *__get_request(struct request_list *rl, int rw_flags,
* it will be created after releasing queue_lock.
*/
if (blk_rq_should_init_elevator(bio) && !blk_queue_bypass(q)) {
- rw_flags |= REQ_ELVPRIV;
+ op_flags |= REQ_ELVPRIV;
q->nr_rqs_elvpriv++;
if (et->icq_cache && ioc)
icq = ioc_lookup_icq(ioc, q);
}
if (blk_queue_io_stat(q))
- rw_flags |= REQ_IO_STAT;
+ op_flags |= REQ_IO_STAT;
spin_unlock_irq(q->queue_lock);
/* allocate and init request */
@@ -1149,10 +1151,10 @@ static struct request *__get_request(struct request_list *rl, int rw_flags,
blk_rq_init(q, rq);
blk_rq_set_rl(rq, rl);
- rq->cmd_flags = rw_flags | REQ_ALLOCED;
+ req_set_op_attrs(rq, op, op_flags | REQ_ALLOCED);
/* init elvpriv */
- if (rw_flags & REQ_ELVPRIV) {
+ if (op_flags & REQ_ELVPRIV) {
if (unlikely(et->icq_cache && !icq)) {
if (ioc)
icq = ioc_create_icq(ioc, q, gfp_mask);
@@ -1178,7 +1180,7 @@ out:
if (ioc_batching(q, ioc))
ioc->nr_batch_requests--;
- trace_block_getrq(q, bio, rw_flags & 1);
+ trace_block_getrq(q, bio, op);
return rq;
fail_elvpriv:
@@ -1208,7 +1210,7 @@ fail_alloc:
* queue, but this is pretty rare.
*/
spin_lock_irq(q->queue_lock);
- freed_request(rl, rw_flags);
+ freed_request(rl, op, op_flags);
/*
* in the very unlikely event that allocation failed and no
@@ -1226,7 +1228,8 @@ rq_starved:
/**
* get_request - get a free request
* @q: request_queue to allocate request from
- * @rw_flags: RW and SYNC flags
+ * @op: REQ_OP_READ/REQ_OP_WRITE
+ * @op_flags: rq_flag_bits
* @bio: bio to allocate request for (can be %NULL)
* @gfp_mask: allocation mask
*
@@ -1237,17 +1240,18 @@ rq_starved:
* Returns ERR_PTR on failure, with @q->queue_lock held.
* Returns request pointer on success, with @q->queue_lock *not held*.
*/
-static struct request *get_request(struct request_queue *q, int rw_flags,
- struct bio *bio, gfp_t gfp_mask)
+static struct request *get_request(struct request_queue *q, int op,
+ int op_flags, struct bio *bio,
+ gfp_t gfp_mask)
{
- const bool is_sync = rw_is_sync(rw_flags) != 0;
+ const bool is_sync = rw_is_sync(op, op_flags) != 0;
DEFINE_WAIT(wait);
struct request_list *rl;
struct request *rq;
rl = blk_get_rl(q, bio); /* transferred to @rq on success */
retry:
- rq = __get_request(rl, rw_flags, bio, gfp_mask);
+ rq = __get_request(rl, op, op_flags, bio, gfp_mask);
if (!IS_ERR(rq))
return rq;
@@ -1260,7 +1264,7 @@ retry:
prepare_to_wait_exclusive(&rl->wait[is_sync], &wait,
TASK_UNINTERRUPTIBLE);
- trace_block_sleeprq(q, bio, rw_flags & 1);
+ trace_block_sleeprq(q, bio, op);
spin_unlock_irq(q->queue_lock);
io_schedule();
@@ -1289,7 +1293,7 @@ static struct request *blk_old_get_request(struct request_queue *q, int rw,
create_io_context(gfp_mask, q->node);
spin_lock_irq(q->queue_lock);
- rq = get_request(q, rw, NULL, gfp_mask);
+ rq = get_request(q, rw, 0, NULL, gfp_mask);
if (IS_ERR(rq))
spin_unlock_irq(q->queue_lock);
/* q->queue_lock is unlocked at this point */
@@ -1491,13 +1495,14 @@ void __blk_put_request(struct request_queue *q, struct request *req)
*/
if (req->cmd_flags & REQ_ALLOCED) {
unsigned int flags = req->cmd_flags;
+ int op = req_op(req);
struct request_list *rl = blk_rq_rl(req);
BUG_ON(!list_empty(&req->queuelist));
BUG_ON(ELV_ON_HASH(req));
blk_free_request(rl, req);
- freed_request(rl, flags);
+ freed_request(rl, op, flags);
blk_put_rl(rl);
}
}
@@ -1712,7 +1717,7 @@ static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio)
{
const bool sync = !!(bio->bi_rw & REQ_SYNC);
struct blk_plug *plug;
- int el_ret, rw_flags, where = ELEVATOR_INSERT_SORT;
+ int el_ret, rw_flags = 0, where = ELEVATOR_INSERT_SORT;
struct request *req;
unsigned int request_count = 0;
@@ -1731,7 +1736,7 @@ static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio)
return BLK_QC_T_NONE;
}
- if (bio->bi_rw & (REQ_FLUSH | REQ_FUA)) {
+ if (bio->bi_rw & (REQ_PREFLUSH | REQ_FUA)) {
spin_lock_irq(q->queue_lock);
where = ELEVATOR_INSERT_FLUSH;
goto get_rq;
@@ -1772,15 +1777,19 @@ get_rq:
* but we need to set it earlier to expose the sync flag to the
* rq allocator and io schedulers.
*/
- rw_flags = bio_data_dir(bio);
if (sync)
rw_flags |= REQ_SYNC;
/*
+ * Add in META/PRIO flags, if set, before we get to the IO scheduler
+ */
+ rw_flags |= (bio->bi_rw & (REQ_META | REQ_PRIO));
+
+ /*
* Grab a free request. This is might sleep but can not fail.
* Returns with the queue unlocked.
*/
- req = get_request(q, rw_flags, bio, GFP_NOIO);
+ req = get_request(q, bio_data_dir(bio), rw_flags, bio, GFP_NOIO);
if (IS_ERR(req)) {
bio->bi_error = PTR_ERR(req);
bio_endio(bio);
@@ -1849,7 +1858,7 @@ static void handle_bad_sector(struct bio *bio)
char b[BDEVNAME_SIZE];
printk(KERN_INFO "attempt to access beyond end of device\n");
- printk(KERN_INFO "%s: rw=%ld, want=%Lu, limit=%Lu\n",
+ printk(KERN_INFO "%s: rw=%d, want=%Lu, limit=%Lu\n",
bdevname(bio->bi_bdev, b),
bio->bi_rw,
(unsigned long long)bio_end_sector(bio),
@@ -1964,23 +1973,23 @@ generic_make_request_checks(struct bio *bio)
* drivers without flush support don't have to worry
* about them.
*/
- if ((bio->bi_rw & (REQ_FLUSH | REQ_FUA)) &&
+ if ((bio->bi_rw & (REQ_PREFLUSH | REQ_FUA)) &&
!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) {
- bio->bi_rw &= ~(REQ_FLUSH | REQ_FUA);
+ bio->bi_rw &= ~(REQ_PREFLUSH | REQ_FUA);
if (!nr_sectors) {
err = 0;
goto end_io;
}
}
- if ((bio->bi_rw & REQ_DISCARD) &&
+ if ((bio_op(bio) == REQ_OP_DISCARD) &&
(!blk_queue_discard(q) ||
((bio->bi_rw & REQ_SECURE) && !blk_queue_secdiscard(q)))) {
err = -EOPNOTSUPP;
goto end_io;
}
- if (bio->bi_rw & REQ_WRITE_SAME && !bdev_write_same(bio->bi_bdev)) {
+ if (bio_op(bio) == REQ_OP_WRITE_SAME && !bdev_write_same(bio->bi_bdev)) {
err = -EOPNOTSUPP;
goto end_io;
}
@@ -2094,7 +2103,6 @@ EXPORT_SYMBOL(generic_make_request);
/**
* submit_bio - submit a bio to the block device layer for I/O
- * @rw: whether to %READ or %WRITE, or maybe to %READA (read ahead)
* @bio: The &struct bio which describes the I/O
*
* submit_bio() is very similar in purpose to generic_make_request(), and
@@ -2102,10 +2110,8 @@ EXPORT_SYMBOL(generic_make_request);
* interfaces; @bio must be presetup and ready for I/O.
*
*/
-blk_qc_t submit_bio(int rw, struct bio *bio)
+blk_qc_t submit_bio(struct bio *bio)
{
- bio->bi_rw |= rw;
-
/*
* If it's a regular read/write or a barrier with data attached,
* go through the normal accounting stuff before submission.
@@ -2113,12 +2119,12 @@ blk_qc_t submit_bio(int rw, struct bio *bio)
if (bio_has_data(bio)) {
unsigned int count;
- if (unlikely(rw & REQ_WRITE_SAME))
+ if (unlikely(bio_op(bio) == REQ_OP_WRITE_SAME))
count = bdev_logical_block_size(bio->bi_bdev) >> 9;
else
count = bio_sectors(bio);
- if (rw & WRITE) {
+ if (op_is_write(bio_op(bio))) {
count_vm_events(PGPGOUT, count);
} else {
task_io_account_read(bio->bi_iter.bi_size);
@@ -2129,7 +2135,7 @@ blk_qc_t submit_bio(int rw, struct bio *bio)
char b[BDEVNAME_SIZE];
printk(KERN_DEBUG "%s(%d): %s block %Lu on %s (%u sectors)\n",
current->comm, task_pid_nr(current),
- (rw & WRITE) ? "WRITE" : "READ",
+ op_is_write(bio_op(bio)) ? "WRITE" : "READ",
(unsigned long long)bio->bi_iter.bi_sector,
bdevname(bio->bi_bdev, b),
count);
@@ -2160,7 +2166,7 @@ EXPORT_SYMBOL(submit_bio);
static int blk_cloned_rq_check_limits(struct request_queue *q,
struct request *rq)
{
- if (blk_rq_sectors(rq) > blk_queue_get_max_sectors(q, rq->cmd_flags)) {
+ if (blk_rq_sectors(rq) > blk_queue_get_max_sectors(q, req_op(rq))) {
printk(KERN_ERR "%s: over max size limit.\n", __func__);
return -EIO;
}
@@ -2216,7 +2222,7 @@ int blk_insert_cloned_request(struct request_queue *q, struct request *rq)
*/
BUG_ON(blk_queued_rq(rq));
- if (rq->cmd_flags & (REQ_FLUSH|REQ_FUA))
+ if (rq->cmd_flags & (REQ_PREFLUSH | REQ_FUA))
where = ELEVATOR_INSERT_FLUSH;
add_acct_request(q, rq, where);
@@ -2979,8 +2985,7 @@ EXPORT_SYMBOL_GPL(__blk_end_request_err);
void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
struct bio *bio)
{
- /* Bit 0 (R/W) is identical in rq->cmd_flags and bio->bi_rw */
- rq->cmd_flags |= bio->bi_rw & REQ_WRITE;
+ req_set_op(rq, bio_op(bio));
if (bio_has_data(bio))
rq->nr_phys_segments = bio_phys_segments(q, bio);
@@ -3065,7 +3070,8 @@ EXPORT_SYMBOL_GPL(blk_rq_unprep_clone);
static void __blk_rq_prep_clone(struct request *dst, struct request *src)
{
dst->cpu = src->cpu;
- dst->cmd_flags |= (src->cmd_flags & REQ_CLONE_MASK) | REQ_NOMERGE;
+ req_set_op_attrs(dst, req_op(src),
+ (src->cmd_flags & REQ_CLONE_MASK) | REQ_NOMERGE);
dst->cmd_type = src->cmd_type;
dst->__sector = blk_rq_pos(src);
dst->__data_len = blk_rq_bytes(src);
@@ -3310,7 +3316,7 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)
/*
* rq is already accounted, so use raw insert
*/
- if (rq->cmd_flags & (REQ_FLUSH | REQ_FUA))
+ if (rq->cmd_flags & (REQ_PREFLUSH | REQ_FUA))
__elv_add_request(q, rq, ELEVATOR_INSERT_FLUSH);
else
__elv_add_request(q, rq, ELEVATOR_INSERT_SORT_MERGE);
diff --git a/block/blk-exec.c b/block/blk-exec.c
index 3fec8a29d0fa..7ea04325d02f 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -62,7 +62,7 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
/*
* don't check dying flag for MQ because the request won't
- * be resued after dying flag is set
+ * be reused after dying flag is set
*/
if (q->mq_ops) {
blk_mq_insert_request(rq, at_head, true, false);
diff --git a/block/blk-flush.c b/block/blk-flush.c
index b1c91d229e5e..d308def812db 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -10,8 +10,8 @@
* optional steps - PREFLUSH, DATA and POSTFLUSH - according to the request
* properties and hardware capability.
*
- * If a request doesn't have data, only REQ_FLUSH makes sense, which
- * indicates a simple flush request. If there is data, REQ_FLUSH indicates
+ * If a request doesn't have data, only REQ_PREFLUSH makes sense, which
+ * indicates a simple flush request. If there is data, REQ_PREFLUSH indicates
* that the device cache should be flushed before the data is executed, and
* REQ_FUA means that the data must be on non-volatile media on request
* completion.
@@ -20,16 +20,16 @@
* difference. The requests are either completed immediately if there's no
* data or executed as normal requests otherwise.
*
- * If the device has writeback cache and supports FUA, REQ_FLUSH is
+ * If the device has writeback cache and supports FUA, REQ_PREFLUSH is
* translated to PREFLUSH but REQ_FUA is passed down directly with DATA.
*
- * If the device has writeback cache and doesn't support FUA, REQ_FLUSH is
- * translated to PREFLUSH and REQ_FUA to POSTFLUSH.
+ * If the device has writeback cache and doesn't support FUA, REQ_PREFLUSH
+ * is translated to PREFLUSH and REQ_FUA to POSTFLUSH.
*
* The actual execution of flush is double buffered. Whenever a request
* needs to execute PRE or POSTFLUSH, it queues at
* fq->flush_queue[fq->flush_pending_idx]. Once certain criteria are met, a
- * flush is issued and the pending_idx is toggled. When the flush
+ * REQ_OP_FLUSH is issued and the pending_idx is toggled. When the flush
* completes, all the requests which were pending are proceeded to the next
* step. This allows arbitrary merging of different types of FLUSH/FUA
* requests.
@@ -103,7 +103,7 @@ static unsigned int blk_flush_policy(unsigned long fflags, struct request *rq)
policy |= REQ_FSEQ_DATA;
if (fflags & (1UL << QUEUE_FLAG_WC)) {
- if (rq->cmd_flags & REQ_FLUSH)
+ if (rq->cmd_flags & REQ_PREFLUSH)
policy |= REQ_FSEQ_PREFLUSH;
if (!(fflags & (1UL << QUEUE_FLAG_FUA)) &&
(rq->cmd_flags & REQ_FUA))
@@ -330,7 +330,7 @@ static bool blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq)
}
flush_rq->cmd_type = REQ_TYPE_FS;
- flush_rq->cmd_flags = WRITE_FLUSH | REQ_FLUSH_SEQ;
+ req_set_op_attrs(flush_rq, REQ_OP_FLUSH, WRITE_FLUSH | REQ_FLUSH_SEQ);
flush_rq->rq_disk = first_rq->rq_disk;
flush_rq->end_io = flush_end_io;
@@ -391,9 +391,9 @@ void blk_insert_flush(struct request *rq)
/*
* @policy now records what operations need to be done. Adjust
- * REQ_FLUSH and FUA for the driver.
+ * REQ_PREFLUSH and FUA for the driver.
*/
- rq->cmd_flags &= ~REQ_FLUSH;
+ rq->cmd_flags &= ~REQ_PREFLUSH;
if (!(fflags & (1UL << QUEUE_FLAG_FUA)))
rq->cmd_flags &= ~REQ_FUA;
@@ -485,8 +485,9 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
bio = bio_alloc(gfp_mask, 0);
bio->bi_bdev = bdev;
+ bio_set_op_attrs(bio, REQ_OP_WRITE, WRITE_FLUSH);
- ret = submit_bio_wait(WRITE_FLUSH, bio);
+ ret = submit_bio_wait(bio);
/*
* The driver must store the error location in ->bi_sector, if
diff --git a/block/blk-lib.c b/block/blk-lib.c
index 9e29dc351695..9031d2af0b47 100644
--- a/block/blk-lib.c
+++ b/block/blk-lib.c
@@ -9,21 +9,22 @@
#include "blk.h"
-static struct bio *next_bio(struct bio *bio, int rw, unsigned int nr_pages,
+static struct bio *next_bio(struct bio *bio, unsigned int nr_pages,
gfp_t gfp)
{
struct bio *new = bio_alloc(gfp, nr_pages);
if (bio) {
bio_chain(bio, new);
- submit_bio(rw, bio);
+ submit_bio(bio);
}
return new;
}
int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
- sector_t nr_sects, gfp_t gfp_mask, int type, struct bio **biop)
+ sector_t nr_sects, gfp_t gfp_mask, int op_flags,
+ struct bio **biop)
{
struct request_queue *q = bdev_get_queue(bdev);
struct bio *bio = *biop;
@@ -34,7 +35,7 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
return -ENXIO;
if (!blk_queue_discard(q))
return -EOPNOTSUPP;
- if ((type & REQ_SECURE) && !blk_queue_secdiscard(q))
+ if ((op_flags & REQ_SECURE) && !blk_queue_secdiscard(q))
return -EOPNOTSUPP;
/* Zero-sector (unknown) and one-sector granularities are the same. */
@@ -62,9 +63,10 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
req_sects = end_sect - sector;
}
- bio = next_bio(bio, type, 1, gfp_mask);
+ bio = next_bio(bio, 1, gfp_mask);
bio->bi_iter.bi_sector = sector;
bio->bi_bdev = bdev;
+ bio_set_op_attrs(bio, REQ_OP_DISCARD, op_flags);
bio->bi_iter.bi_size = req_sects << 9;
nr_sects -= req_sects;
@@ -98,19 +100,19 @@ EXPORT_SYMBOL(__blkdev_issue_discard);
int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, unsigned long flags)
{
- int type = REQ_WRITE | REQ_DISCARD;
+ int op_flags = 0;
struct bio *bio = NULL;
struct blk_plug plug;
int ret;
if (flags & BLKDEV_DISCARD_SECURE)
- type |= REQ_SECURE;
+ op_flags |= REQ_SECURE;
blk_start_plug(&plug);
- ret = __blkdev_issue_discard(bdev, sector, nr_sects, gfp_mask, type,
+ ret = __blkdev_issue_discard(bdev, sector, nr_sects, gfp_mask, op_flags,
&bio);
if (!ret && bio) {
- ret = submit_bio_wait(type, bio);
+ ret = submit_bio_wait(bio);
if (ret == -EOPNOTSUPP)
ret = 0;
bio_put(bio);
@@ -148,13 +150,14 @@ int blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
max_write_same_sectors = UINT_MAX >> 9;
while (nr_sects) {
- bio = next_bio(bio, REQ_WRITE | REQ_WRITE_SAME, 1, gfp_mask);
+ bio = next_bio(bio, 1, gfp_mask);
bio->bi_iter.bi_sector = sector;
bio->bi_bdev = bdev;
bio->bi_vcnt = 1;
bio->bi_io_vec->bv_page = page;
bio->bi_io_vec->bv_offset = 0;
bio->bi_io_vec->bv_len = bdev_logical_block_size(bdev);
+ bio_set_op_attrs(bio, REQ_OP_WRITE_SAME, 0);
if (nr_sects > max_write_same_sectors) {
bio->bi_iter.bi_size = max_write_same_sectors << 9;
@@ -167,7 +170,7 @@ int blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
}
if (bio) {
- ret = submit_bio_wait(REQ_WRITE | REQ_WRITE_SAME, bio);
+ ret = submit_bio_wait(bio);
bio_put(bio);
}
return ret != -EOPNOTSUPP ? ret : 0;
@@ -193,11 +196,11 @@ static int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
unsigned int sz;
while (nr_sects != 0) {
- bio = next_bio(bio, WRITE,
- min(nr_sects, (sector_t)BIO_MAX_PAGES),
+ bio = next_bio(bio, min(nr_sects, (sector_t)BIO_MAX_PAGES),
gfp_mask);
bio->bi_iter.bi_sector = sector;
bio->bi_bdev = bdev;
+ bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
while (nr_sects != 0) {
sz = min((sector_t) PAGE_SIZE >> 9 , nr_sects);
@@ -210,7 +213,7 @@ static int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
}
if (bio) {
- ret = submit_bio_wait(WRITE, bio);
+ ret = submit_bio_wait(bio);
bio_put(bio);
return ret;
}
diff --git a/block/blk-map.c b/block/blk-map.c
index b9f88b7751fb..61733a660c3a 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -224,7 +224,7 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
return PTR_ERR(bio);
if (!reading)
- bio->bi_rw |= REQ_WRITE;
+ bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
if (do_copy)
rq->cmd_flags |= REQ_COPY_USER;
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 261353166dcf..5e4d93edeaf7 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -172,9 +172,9 @@ void blk_queue_split(struct request_queue *q, struct bio **bio,
struct bio *split, *res;
unsigned nsegs;
- if ((*bio)->bi_rw & REQ_DISCARD)
+ if (bio_op(*bio) == REQ_OP_DISCARD)
split = blk_bio_discard_split(q, *bio, bs, &nsegs);
- else if ((*bio)->bi_rw & REQ_WRITE_SAME)
+ else if (bio_op(*bio) == REQ_OP_WRITE_SAME)
split = blk_bio_write_same_split(q, *bio, bs, &nsegs);
else
split = blk_bio_segment_split(q, *bio, q->bio_split, &nsegs);
@@ -213,10 +213,10 @@ static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
* This should probably be returning 0, but blk_add_request_payload()
* (Christoph!!!!)
*/
- if (bio->bi_rw & REQ_DISCARD)
+ if (bio_op(bio) == REQ_OP_DISCARD)
return 1;
- if (bio->bi_rw & REQ_WRITE_SAME)
+ if (bio_op(bio) == REQ_OP_WRITE_SAME)
return 1;
fbio = bio;
@@ -385,7 +385,7 @@ static int __blk_bios_map_sg(struct request_queue *q, struct bio *bio,
nsegs = 0;
cluster = blk_queue_cluster(q);
- if (bio->bi_rw & REQ_DISCARD) {
+ if (bio_op(bio) == REQ_OP_DISCARD) {
/*
* This is a hack - drivers should be neither modifying the
* biovec, nor relying on bi_vcnt - but because of
@@ -400,7 +400,7 @@ static int __blk_bios_map_sg(struct request_queue *q, struct bio *bio,
return 0;
}
- if (bio->bi_rw & REQ_WRITE_SAME) {
+ if (bio_op(bio) == REQ_OP_WRITE_SAME) {
single_segment:
*sg = sglist;
bvec = bio_iovec(bio);
@@ -439,7 +439,7 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq,
}
if (q->dma_drain_size && q->dma_drain_needed(rq)) {
- if (rq->cmd_flags & REQ_WRITE)
+ if (op_is_write(req_op(rq)))
memset(q->dma_drain_buffer, 0, q->dma_drain_size);
sg_unmark_end(sg);
@@ -500,7 +500,7 @@ int ll_back_merge_fn(struct request_queue *q, struct request *req,
integrity_req_gap_back_merge(req, bio))
return 0;
if (blk_rq_sectors(req) + bio_sectors(bio) >
- blk_rq_get_max_sectors(req)) {
+ blk_rq_get_max_sectors(req, blk_rq_pos(req))) {
req->cmd_flags |= REQ_NOMERGE;
if (req == q->last_merge)
q->last_merge = NULL;
@@ -524,7 +524,7 @@ int ll_front_merge_fn(struct request_queue *q, struct request *req,
integrity_req_gap_front_merge(req, bio))
return 0;
if (blk_rq_sectors(req) + bio_sectors(bio) >
- blk_rq_get_max_sectors(req)) {
+ blk_rq_get_max_sectors(req, bio->bi_iter.bi_sector)) {
req->cmd_flags |= REQ_NOMERGE;
if (req == q->last_merge)
q->last_merge = NULL;
@@ -570,7 +570,7 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
* Will it become too large?
*/
if ((blk_rq_sectors(req) + blk_rq_sectors(next)) >
- blk_rq_get_max_sectors(req))
+ blk_rq_get_max_sectors(req, blk_rq_pos(req)))
return 0;
total_phys_segments = req->nr_phys_segments + next->nr_phys_segments;
@@ -649,7 +649,8 @@ static int attempt_merge(struct request_queue *q, struct request *req,
if (!rq_mergeable(req) || !rq_mergeable(next))
return 0;
- if (!blk_check_merge_flags(req->cmd_flags, next->cmd_flags))
+ if (!blk_check_merge_flags(req->cmd_flags, req_op(req), next->cmd_flags,
+ req_op(next)))
return 0;
/*
@@ -663,7 +664,7 @@ static int attempt_merge(struct request_queue *q, struct request *req,
|| req_no_special_merge(next))
return 0;
- if (req->cmd_flags & REQ_WRITE_SAME &&
+ if (req_op(req) == REQ_OP_WRITE_SAME &&
!blk_write_same_mergeable(req->bio, next->bio))
return 0;
@@ -743,6 +744,12 @@ int attempt_front_merge(struct request_queue *q, struct request *rq)
int blk_attempt_req_merge(struct request_queue *q, struct request *rq,
struct request *next)
{
+ struct elevator_queue *e = q->elevator;
+
+ if (e->type->ops.elevator_allow_rq_merge_fn)
+ if (!e->type->ops.elevator_allow_rq_merge_fn(q, rq, next))
+ return 0;
+
return attempt_merge(q, rq, next);
}
@@ -751,7 +758,8 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
if (!rq_mergeable(rq) || !bio_mergeable(bio))
return false;
- if (!blk_check_merge_flags(rq->cmd_flags, bio->bi_rw))
+ if (!blk_check_merge_flags(rq->cmd_flags, req_op(rq), bio->bi_rw,
+ bio_op(bio)))
return false;
/* different data direction or already started, don't merge */
@@ -767,7 +775,7 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
return false;
/* must be using the same buffer */
- if (rq->cmd_flags & REQ_WRITE_SAME &&
+ if (req_op(rq) == REQ_OP_WRITE_SAME &&
!blk_write_same_mergeable(rq->bio, bio))
return false;
diff --git a/block/blk-mq.c b/block/blk-mq.c
index f9b9049b1284..2a1920c6d6e5 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -159,16 +159,17 @@ bool blk_mq_can_queue(struct blk_mq_hw_ctx *hctx)
EXPORT_SYMBOL(blk_mq_can_queue);
static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
- struct request *rq, unsigned int rw_flags)
+ struct request *rq, int op,
+ unsigned int op_flags)
{
if (blk_queue_io_stat(q))
- rw_flags |= REQ_IO_STAT;
+ op_flags |= REQ_IO_STAT;
INIT_LIST_HEAD(&rq->queuelist);
/* csd/requeue_work/fifo_time is initialized before use */
rq->q = q;
rq->mq_ctx = ctx;
- rq->cmd_flags |= rw_flags;
+ req_set_op_attrs(rq, op, op_flags);
/* do not touch atomic flags, it needs atomic ops against the timer */
rq->cpu = -1;
INIT_HLIST_NODE(&rq->hash);
@@ -203,11 +204,11 @@ static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
rq->end_io_data = NULL;
rq->next_rq = NULL;
- ctx->rq_dispatched[rw_is_sync(rw_flags)]++;
+ ctx->rq_dispatched[rw_is_sync(op, op_flags)]++;
}
static struct request *
-__blk_mq_alloc_request(struct blk_mq_alloc_data *data, int rw)
+__blk_mq_alloc_request(struct blk_mq_alloc_data *data, int op, int op_flags)
{
struct request *rq;
unsigned int tag;
@@ -222,7 +223,7 @@ __blk_mq_alloc_request(struct blk_mq_alloc_data *data, int rw)
}
rq->tag = tag;
- blk_mq_rq_ctx_init(data->q, data->ctx, rq, rw);
+ blk_mq_rq_ctx_init(data->q, data->ctx, rq, op, op_flags);
return rq;
}
@@ -246,7 +247,7 @@ struct request *blk_mq_alloc_request(struct request_queue *q, int rw,
hctx = q->mq_ops->map_queue(q, ctx->cpu);
blk_mq_set_alloc_data(&alloc_data, q, flags, ctx, hctx);
- rq = __blk_mq_alloc_request(&alloc_data, rw);
+ rq = __blk_mq_alloc_request(&alloc_data, rw, 0);
if (!rq && !(flags & BLK_MQ_REQ_NOWAIT)) {
__blk_mq_run_hw_queue(hctx);
blk_mq_put_ctx(ctx);
@@ -254,7 +255,7 @@ struct request *blk_mq_alloc_request(struct request_queue *q, int rw,
ctx = blk_mq_get_ctx(q);
hctx = q->mq_ops->map_queue(q, ctx->cpu);
blk_mq_set_alloc_data(&alloc_data, q, flags, ctx, hctx);
- rq = __blk_mq_alloc_request(&alloc_data, rw);
+ rq = __blk_mq_alloc_request(&alloc_data, rw, 0);
ctx = alloc_data.ctx;
}
blk_mq_put_ctx(ctx);
@@ -784,7 +785,7 @@ static void __blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx)
switch (ret) {
case BLK_MQ_RQ_QUEUE_OK:
queued++;
- continue;
+ break;
case BLK_MQ_RQ_QUEUE_BUSY:
list_add(&rq->queuelist, &rq_list);
__blk_mq_requeue_request(rq);
@@ -1169,28 +1170,29 @@ static struct request *blk_mq_map_request(struct request_queue *q,
struct blk_mq_hw_ctx *hctx;
struct blk_mq_ctx *ctx;
struct request *rq;
- int rw = bio_data_dir(bio);
+ int op = bio_data_dir(bio);
+ int op_flags = 0;
struct blk_mq_alloc_data alloc_data;
blk_queue_enter_live(q);
ctx = blk_mq_get_ctx(q);
hctx = q->mq_ops->map_queue(q, ctx->cpu);
- if (rw_is_sync(bio->bi_rw))
- rw |= REQ_SYNC;
+ if (rw_is_sync(bio_op(bio), bio->bi_rw))
+ op_flags |= REQ_SYNC;
- trace_block_getrq(q, bio, rw);
+ trace_block_getrq(q, bio, op);
blk_mq_set_alloc_data(&alloc_data, q, BLK_MQ_REQ_NOWAIT, ctx, hctx);
- rq = __blk_mq_alloc_request(&alloc_data, rw);
+ rq = __blk_mq_alloc_request(&alloc_data, op, op_flags);
if (unlikely(!rq)) {
__blk_mq_run_hw_queue(hctx);
blk_mq_put_ctx(ctx);
- trace_block_sleeprq(q, bio, rw);
+ trace_block_sleeprq(q, bio, op);
ctx = blk_mq_get_ctx(q);
hctx = q->mq_ops->map_queue(q, ctx->cpu);
blk_mq_set_alloc_data(&alloc_data, q, 0, ctx, hctx);
- rq = __blk_mq_alloc_request(&alloc_data, rw);
+ rq = __blk_mq_alloc_request(&alloc_data, op, op_flags);
ctx = alloc_data.ctx;
hctx = alloc_data.hctx;
}
@@ -1244,8 +1246,8 @@ static int blk_mq_direct_issue_request(struct request *rq, blk_qc_t *cookie)
*/
static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
{
- const int is_sync = rw_is_sync(bio->bi_rw);
- const int is_flush_fua = bio->bi_rw & (REQ_FLUSH | REQ_FUA);
+ const int is_sync = rw_is_sync(bio_op(bio), bio->bi_rw);
+ const int is_flush_fua = bio->bi_rw & (REQ_PREFLUSH | REQ_FUA);
struct blk_map_ctx data;
struct request *rq;
unsigned int request_count = 0;
@@ -1338,8 +1340,8 @@ done:
*/
static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio)
{
- const int is_sync = rw_is_sync(bio->bi_rw);
- const int is_flush_fua = bio->bi_rw & (REQ_FLUSH | REQ_FUA);
+ const int is_sync = rw_is_sync(bio_op(bio), bio->bi_rw);
+ const int is_flush_fua = bio->bi_rw & (REQ_PREFLUSH | REQ_FUA);
struct blk_plug *plug;
unsigned int request_count = 0;
struct blk_map_ctx data;
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 99205965f559..f87a7e747d36 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -379,6 +379,11 @@ static ssize_t queue_wc_store(struct request_queue *q, const char *page,
return count;
}
+static ssize_t queue_dax_show(struct request_queue *q, char *page)
+{
+ return queue_var_show(blk_queue_dax(q), page);
+}
+
static struct queue_sysfs_entry queue_requests_entry = {
.attr = {.name = "nr_requests", .mode = S_IRUGO | S_IWUSR },
.show = queue_requests_show,
@@ -516,6 +521,11 @@ static struct queue_sysfs_entry queue_wc_entry = {
.store = queue_wc_store,
};
+static struct queue_sysfs_entry queue_dax_entry = {
+ .attr = {.name = "dax", .mode = S_IRUGO },
+ .show = queue_dax_show,
+};
+
static struct attribute *default_attrs[] = {
&queue_requests_entry.attr,
&queue_ra_entry.attr,
@@ -542,6 +552,7 @@ static struct attribute *default_attrs[] = {
&queue_random_entry.attr,
&queue_poll_entry.attr,
&queue_wc_entry.attr,
+ &queue_dax_entry.attr,
NULL,
};
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 4a349787bc62..acabba198de9 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -10,7 +10,7 @@
#include <linux/slab.h>
#include <linux/blkdev.h>
#include <linux/elevator.h>
-#include <linux/jiffies.h>
+#include <linux/ktime.h>
#include <linux/rbtree.h>
#include <linux/ioprio.h>
#include <linux/blktrace_api.h>
@@ -22,28 +22,28 @@
*/
/* max queue in one round of service */
static const int cfq_quantum = 8;
-static const int cfq_fifo_expire[2] = { HZ / 4, HZ / 8 };
+static const u64 cfq_fifo_expire[2] = { NSEC_PER_SEC / 4, NSEC_PER_SEC / 8 };
/* maximum backwards seek, in KiB */
static const int cfq_back_max = 16 * 1024;
/* penalty of a backwards seek */
static const int cfq_back_penalty = 2;
-static const int cfq_slice_sync = HZ / 10;
-static int cfq_slice_async = HZ / 25;
+static const u64 cfq_slice_sync = NSEC_PER_SEC / 10;
+static u64 cfq_slice_async = NSEC_PER_SEC / 25;
static const int cfq_slice_async_rq = 2;
-static int cfq_slice_idle = HZ / 125;
-static int cfq_group_idle = HZ / 125;
-static const int cfq_target_latency = HZ * 3/10; /* 300 ms */
+static u64 cfq_slice_idle = NSEC_PER_SEC / 125;
+static u64 cfq_group_idle = NSEC_PER_SEC / 125;
+static const u64 cfq_target_latency = (u64)NSEC_PER_SEC * 3/10; /* 300 ms */
static const int cfq_hist_divisor = 4;
/*
* offset from end of service tree
*/
-#define CFQ_IDLE_DELAY (HZ / 5)
+#define CFQ_IDLE_DELAY (NSEC_PER_SEC / 5)
/*
* below this threshold, we consider thinktime immediate
*/
-#define CFQ_MIN_TT (2)
+#define CFQ_MIN_TT (2 * NSEC_PER_SEC / HZ)
#define CFQ_SLICE_SCALE (5)
#define CFQ_HW_QUEUE_MIN (5)
@@ -73,11 +73,11 @@ static struct kmem_cache *cfq_pool;
#define CFQ_WEIGHT_LEGACY_MAX 1000
struct cfq_ttime {
- unsigned long last_end_request;
+ u64 last_end_request;
- unsigned long ttime_total;
+ u64 ttime_total;
+ u64 ttime_mean;
unsigned long ttime_samples;
- unsigned long ttime_mean;
};
/*
@@ -94,7 +94,7 @@ struct cfq_rb_root {
struct cfq_ttime ttime;
};
#define CFQ_RB_ROOT (struct cfq_rb_root) { .rb = RB_ROOT, \
- .ttime = {.last_end_request = jiffies,},}
+ .ttime = {.last_end_request = ktime_get_ns(),},}
/*
* Per process-grouping structure
@@ -109,7 +109,7 @@ struct cfq_queue {
/* service_tree member */
struct rb_node rb_node;
/* service_tree key */
- unsigned long rb_key;
+ u64 rb_key;
/* prio tree member */
struct rb_node p_node;
/* prio tree root we belong to, if any */
@@ -126,13 +126,13 @@ struct cfq_queue {
struct list_head fifo;
/* time when queue got scheduled in to dispatch first request. */
- unsigned long dispatch_start;
- unsigned int allocated_slice;
- unsigned int slice_dispatch;
+ u64 dispatch_start;
+ u64 allocated_slice;
+ u64 slice_dispatch;
/* time when first request from queue completed and slice started. */
- unsigned long slice_start;
- unsigned long slice_end;
- long slice_resid;
+ u64 slice_start;
+ u64 slice_end;
+ s64 slice_resid;
/* pending priority requests */
int prio_pending;
@@ -141,7 +141,7 @@ struct cfq_queue {
/* io prio of this group */
unsigned short ioprio, org_ioprio;
- unsigned short ioprio_class;
+ unsigned short ioprio_class, org_ioprio_class;
pid_t pid;
@@ -290,7 +290,7 @@ struct cfq_group {
struct cfq_rb_root service_trees[2][3];
struct cfq_rb_root service_tree_idle;
- unsigned long saved_wl_slice;
+ u64 saved_wl_slice;
enum wl_type_t saved_wl_type;
enum wl_class_t saved_wl_class;
@@ -329,7 +329,7 @@ struct cfq_data {
*/
enum wl_class_t serving_wl_class;
enum wl_type_t serving_wl_type;
- unsigned long workload_expires;
+ u64 workload_expires;
struct cfq_group *serving_group;
/*
@@ -362,7 +362,7 @@ struct cfq_data {
/*
* idle window management
*/
- struct timer_list idle_slice_timer;
+ struct hrtimer idle_slice_timer;
struct work_struct unplug_work;
struct cfq_queue *active_queue;
@@ -374,22 +374,22 @@ struct cfq_data {
* tunables, see top of file
*/
unsigned int cfq_quantum;
- unsigned int cfq_fifo_expire[2];
unsigned int cfq_back_penalty;
unsigned int cfq_back_max;
- unsigned int cfq_slice[2];
unsigned int cfq_slice_async_rq;
- unsigned int cfq_slice_idle;
- unsigned int cfq_group_idle;
unsigned int cfq_latency;
- unsigned int cfq_target_latency;
+ u64 cfq_fifo_expire[2];
+ u64 cfq_slice[2];
+ u64 cfq_slice_idle;
+ u64 cfq_group_idle;
+ u64 cfq_target_latency;
/*
* Fallback dummy cfqq for extreme OOM conditions
*/
struct cfq_queue oom_cfqq;
- unsigned long last_delayed_sync;
+ u64 last_delayed_sync;
};
static struct cfq_group *cfq_get_next_cfqg(struct cfq_data *cfqd);
@@ -667,15 +667,16 @@ static inline void cfqg_put(struct cfq_group *cfqg)
} while (0)
static inline void cfqg_stats_update_io_add(struct cfq_group *cfqg,
- struct cfq_group *curr_cfqg, int rw)
+ struct cfq_group *curr_cfqg, int op,
+ int op_flags)
{
- blkg_rwstat_add(&cfqg->stats.queued, rw, 1);
+ blkg_rwstat_add(&cfqg->stats.queued, op, op_flags, 1);
cfqg_stats_end_empty_time(&cfqg->stats);
cfqg_stats_set_start_group_wait_time(cfqg, curr_cfqg);
}
static inline void cfqg_stats_update_timeslice_used(struct cfq_group *cfqg,
- unsigned long time, unsigned long unaccounted_time)
+ uint64_t time, unsigned long unaccounted_time)
{
blkg_stat_add(&cfqg->stats.time, time);
#ifdef CONFIG_DEBUG_BLK_CGROUP
@@ -683,26 +684,30 @@ static inline void cfqg_stats_update_timeslice_used(struct cfq_group *cfqg,
#endif
}
-static inline void cfqg_stats_update_io_remove(struct cfq_group *cfqg, int rw)
+static inline void cfqg_stats_update_io_remove(struct cfq_group *cfqg, int op,
+ int op_flags)
{
- blkg_rwstat_add(&cfqg->stats.queued, rw, -1);
+ blkg_rwstat_add(&cfqg->stats.queued, op, op_flags, -1);
}
-static inline void cfqg_stats_update_io_merged(struct cfq_group *cfqg, int rw)
+static inline void cfqg_stats_update_io_merged(struct cfq_group *cfqg, int op,
+ int op_flags)
{
- blkg_rwstat_add(&cfqg->stats.merged, rw, 1);
+ blkg_rwstat_add(&cfqg->stats.merged, op, op_flags, 1);
}
static inline void cfqg_stats_update_completion(struct cfq_group *cfqg,
- uint64_t start_time, uint64_t io_start_time, int rw)
+ uint64_t start_time, uint64_t io_start_time, int op,
+ int op_flags)
{
struct cfqg_stats *stats = &cfqg->stats;
unsigned long long now = sched_clock();
if (time_after64(now, io_start_time))
- blkg_rwstat_add(&stats->service_time, rw, now - io_start_time);
+ blkg_rwstat_add(&stats->service_time, op, op_flags,
+ now - io_start_time);
if (time_after64(io_start_time, start_time))
- blkg_rwstat_add(&stats->wait_time, rw,
+ blkg_rwstat_add(&stats->wait_time, op, op_flags,
io_start_time - start_time);
}
@@ -781,13 +786,16 @@ static inline void cfqg_put(struct cfq_group *cfqg) { }
#define cfq_log_cfqg(cfqd, cfqg, fmt, args...) do {} while (0)
static inline void cfqg_stats_update_io_add(struct cfq_group *cfqg,
- struct cfq_group *curr_cfqg, int rw) { }
+ struct cfq_group *curr_cfqg, int op, int op_flags) { }
static inline void cfqg_stats_update_timeslice_used(struct cfq_group *cfqg,
- unsigned long time, unsigned long unaccounted_time) { }
-static inline void cfqg_stats_update_io_remove(struct cfq_group *cfqg, int rw) { }
-static inline void cfqg_stats_update_io_merged(struct cfq_group *cfqg, int rw) { }
+ uint64_t time, unsigned long unaccounted_time) { }
+static inline void cfqg_stats_update_io_remove(struct cfq_group *cfqg, int op,
+ int op_flags) { }
+static inline void cfqg_stats_update_io_merged(struct cfq_group *cfqg, int op,
+ int op_flags) { }
static inline void cfqg_stats_update_completion(struct cfq_group *cfqg,
- uint64_t start_time, uint64_t io_start_time, int rw) { }
+ uint64_t start_time, uint64_t io_start_time, int op,
+ int op_flags) { }
#endif /* CONFIG_CFQ_GROUP_IOSCHED */
@@ -807,7 +815,7 @@ static inline void cfqg_stats_update_completion(struct cfq_group *cfqg,
static inline bool cfq_io_thinktime_big(struct cfq_data *cfqd,
struct cfq_ttime *ttime, bool group_idle)
{
- unsigned long slice;
+ u64 slice;
if (!sample_valid(ttime->ttime_samples))
return false;
if (group_idle)
@@ -930,17 +938,18 @@ static inline void cfq_schedule_dispatch(struct cfq_data *cfqd)
* if a queue is marked sync and has sync io queued. A sync queue with async
* io only, should not get full sync slice length.
*/
-static inline int cfq_prio_slice(struct cfq_data *cfqd, bool sync,
+static inline u64 cfq_prio_slice(struct cfq_data *cfqd, bool sync,
unsigned short prio)
{
- const int base_slice = cfqd->cfq_slice[sync];
+ u64 base_slice = cfqd->cfq_slice[sync];
+ u64 slice = div_u64(base_slice, CFQ_SLICE_SCALE);
WARN_ON(prio >= IOPRIO_BE_NR);
- return base_slice + (base_slice/CFQ_SLICE_SCALE * (4 - prio));
+ return base_slice + (slice * (4 - prio));
}
-static inline int
+static inline u64
cfq_prio_to_slice(struct cfq_data *cfqd, struct cfq_queue *cfqq)
{
return cfq_prio_slice(cfqd, cfq_cfqq_sync(cfqq), cfqq->ioprio);
@@ -958,15 +967,14 @@ cfq_prio_to_slice(struct cfq_data *cfqd, struct cfq_queue *cfqq)
*
* The result is also in fixed point w/ CFQ_SERVICE_SHIFT.
*/
-static inline u64 cfqg_scale_charge(unsigned long charge,
+static inline u64 cfqg_scale_charge(u64 charge,
unsigned int vfraction)
{
u64 c = charge << CFQ_SERVICE_SHIFT; /* make it fixed point */
/* charge / vfraction */
c <<= CFQ_SERVICE_SHIFT;
- do_div(c, vfraction);
- return c;
+ return div_u64(c, vfraction);
}
static inline u64 max_vdisktime(u64 min_vdisktime, u64 vdisktime)
@@ -1019,16 +1027,16 @@ static inline unsigned cfq_group_get_avg_queues(struct cfq_data *cfqd,
return cfqg->busy_queues_avg[rt];
}
-static inline unsigned
+static inline u64
cfq_group_slice(struct cfq_data *cfqd, struct cfq_group *cfqg)
{
return cfqd->cfq_target_latency * cfqg->vfraction >> CFQ_SERVICE_SHIFT;
}
-static inline unsigned
+static inline u64
cfq_scaled_cfqq_slice(struct cfq_data *cfqd, struct cfq_queue *cfqq)
{
- unsigned slice = cfq_prio_to_slice(cfqd, cfqq);
+ u64 slice = cfq_prio_to_slice(cfqd, cfqq);
if (cfqd->cfq_latency) {
/*
* interested queues (we consider only the ones with the same
@@ -1036,20 +1044,22 @@ cfq_scaled_cfqq_slice(struct cfq_data *cfqd, struct cfq_queue *cfqq)
*/
unsigned iq = cfq_group_get_avg_queues(cfqd, cfqq->cfqg,
cfq_class_rt(cfqq));
- unsigned sync_slice = cfqd->cfq_slice[1];
- unsigned expect_latency = sync_slice * iq;
- unsigned group_slice = cfq_group_slice(cfqd, cfqq->cfqg);
+ u64 sync_slice = cfqd->cfq_slice[1];
+ u64 expect_latency = sync_slice * iq;
+ u64 group_slice = cfq_group_slice(cfqd, cfqq->cfqg);
if (expect_latency > group_slice) {
- unsigned base_low_slice = 2 * cfqd->cfq_slice_idle;
+ u64 base_low_slice = 2 * cfqd->cfq_slice_idle;
+ u64 low_slice;
+
/* scale low_slice according to IO priority
* and sync vs async */
- unsigned low_slice =
- min(slice, base_low_slice * slice / sync_slice);
+ low_slice = div64_u64(base_low_slice*slice, sync_slice);
+ low_slice = min(slice, low_slice);
/* the adapted slice value is scaled to fit all iqs
* into the target latency */
- slice = max(slice * group_slice / expect_latency,
- low_slice);
+ slice = div64_u64(slice*group_slice, expect_latency);
+ slice = max(slice, low_slice);
}
}
return slice;
@@ -1058,12 +1068,13 @@ cfq_scaled_cfqq_slice(struct cfq_data *cfqd, struct cfq_queue *cfqq)
static inline void
cfq_set_prio_slice(struct cfq_data *cfqd, struct cfq_queue *cfqq)
{
- unsigned slice = cfq_scaled_cfqq_slice(cfqd, cfqq);
+ u64 slice = cfq_scaled_cfqq_slice(cfqd, cfqq);
+ u64 now = ktime_get_ns();
- cfqq->slice_start = jiffies;
- cfqq->slice_end = jiffies + slice;
+ cfqq->slice_start = now;
+ cfqq->slice_end = now + slice;
cfqq->allocated_slice = slice;
- cfq_log_cfqq(cfqd, cfqq, "set_slice=%lu", cfqq->slice_end - jiffies);
+ cfq_log_cfqq(cfqd, cfqq, "set_slice=%llu", cfqq->slice_end - now);
}
/*
@@ -1075,7 +1086,7 @@ static inline bool cfq_slice_used(struct cfq_queue *cfqq)
{
if (cfq_cfqq_slice_new(cfqq))
return false;
- if (time_before(jiffies, cfqq->slice_end))
+ if (ktime_get_ns() < cfqq->slice_end)
return false;
return true;
@@ -1241,8 +1252,8 @@ cfq_find_next_rq(struct cfq_data *cfqd, struct cfq_queue *cfqq,
return cfq_choose_req(cfqd, next, prev, blk_rq_pos(last));
}
-static unsigned long cfq_slice_offset(struct cfq_data *cfqd,
- struct cfq_queue *cfqq)
+static u64 cfq_slice_offset(struct cfq_data *cfqd,
+ struct cfq_queue *cfqq)
{
/*
* just an approximation, should be ok.
@@ -1435,31 +1446,32 @@ cfq_group_notify_queue_del(struct cfq_data *cfqd, struct cfq_group *cfqg)
cfqg_stats_update_dequeue(cfqg);
}
-static inline unsigned int cfq_cfqq_slice_usage(struct cfq_queue *cfqq,
- unsigned int *unaccounted_time)
+static inline u64 cfq_cfqq_slice_usage(struct cfq_queue *cfqq,
+ u64 *unaccounted_time)
{
- unsigned int slice_used;
+ u64 slice_used;
+ u64 now = ktime_get_ns();
/*
* Queue got expired before even a single request completed or
* got expired immediately after first request completion.
*/
- if (!cfqq->slice_start || cfqq->slice_start == jiffies) {
+ if (!cfqq->slice_start || cfqq->slice_start == now) {
/*
* Also charge the seek time incurred to the group, otherwise
* if there are mutiple queues in the group, each can dispatch
* a single request on seeky media and cause lots of seek time
* and group will never know it.
*/
- slice_used = max_t(unsigned, (jiffies - cfqq->dispatch_start),
- 1);
+ slice_used = max_t(u64, (now - cfqq->dispatch_start),
+ jiffies_to_nsecs(1));
} else {
- slice_used = jiffies - cfqq->slice_start;
+ slice_used = now - cfqq->slice_start;
if (slice_used > cfqq->allocated_slice) {
*unaccounted_time = slice_used - cfqq->allocated_slice;
slice_used = cfqq->allocated_slice;
}
- if (time_after(cfqq->slice_start, cfqq->dispatch_start))
+ if (cfqq->slice_start > cfqq->dispatch_start)
*unaccounted_time += cfqq->slice_start -
cfqq->dispatch_start;
}
@@ -1471,10 +1483,11 @@ static void cfq_group_served(struct cfq_data *cfqd, struct cfq_group *cfqg,
struct cfq_queue *cfqq)
{
struct cfq_rb_root *st = &cfqd->grp_service_tree;
- unsigned int used_sl, charge, unaccounted_sl = 0;
+ u64 used_sl, charge, unaccounted_sl = 0;
int nr_sync = cfqg->nr_cfqq - cfqg_busy_async_queues(cfqd, cfqg)
- cfqg->service_tree_idle.count;
unsigned int vfr;
+ u64 now = ktime_get_ns();
BUG_ON(nr_sync < 0);
used_sl = charge = cfq_cfqq_slice_usage(cfqq, &unaccounted_sl);
@@ -1496,9 +1509,8 @@ static void cfq_group_served(struct cfq_data *cfqd, struct cfq_group *cfqg,
cfq_group_service_tree_add(st, cfqg);
/* This group is being expired. Save the context */
- if (time_after(cfqd->workload_expires, jiffies)) {
- cfqg->saved_wl_slice = cfqd->workload_expires
- - jiffies;
+ if (cfqd->workload_expires > now) {
+ cfqg->saved_wl_slice = cfqd->workload_expires - now;
cfqg->saved_wl_type = cfqd->serving_wl_type;
cfqg->saved_wl_class = cfqd->serving_wl_class;
} else
@@ -1507,7 +1519,7 @@ static void cfq_group_served(struct cfq_data *cfqd, struct cfq_group *cfqg,
cfq_log_cfqg(cfqd, cfqg, "served: vt=%llu min_vt=%llu", cfqg->vdisktime,
st->min_vdisktime);
cfq_log_cfqq(cfqq->cfqd, cfqq,
- "sl_used=%u disp=%u charge=%u iops=%u sect=%lu",
+ "sl_used=%llu disp=%llu charge=%llu iops=%u sect=%lu",
used_sl, cfqq->slice_dispatch, charge,
iops_mode(cfqd), cfqq->nr_sectors);
cfqg_stats_update_timeslice_used(cfqg, used_sl, unaccounted_sl);
@@ -1530,7 +1542,7 @@ static void cfq_init_cfqg_base(struct cfq_group *cfqg)
*st = CFQ_RB_ROOT;
RB_CLEAR_NODE(&cfqg->rb_node);
- cfqg->ttime.last_end_request = jiffies;
+ cfqg->ttime.last_end_request = ktime_get_ns();
}
#ifdef CONFIG_CFQ_GROUP_IOSCHED
@@ -2213,10 +2225,11 @@ static void cfq_service_tree_add(struct cfq_data *cfqd, struct cfq_queue *cfqq,
{
struct rb_node **p, *parent;
struct cfq_queue *__cfqq;
- unsigned long rb_key;
+ u64 rb_key;
struct cfq_rb_root *st;
int left;
int new_cfqq = 1;
+ u64 now = ktime_get_ns();
st = st_for(cfqq->cfqg, cfqq_class(cfqq), cfqq_type(cfqq));
if (cfq_class_idle(cfqq)) {
@@ -2226,7 +2239,7 @@ static void cfq_service_tree_add(struct cfq_data *cfqd, struct cfq_queue *cfqq,
__cfqq = rb_entry(parent, struct cfq_queue, rb_node);
rb_key += __cfqq->rb_key;
} else
- rb_key += jiffies;
+ rb_key += now;
} else if (!add_front) {
/*
* Get our rb key offset. Subtract any residual slice
@@ -2234,13 +2247,13 @@ static void cfq_service_tree_add(struct cfq_data *cfqd, struct cfq_queue *cfqq,
* count indicates slice overrun, and this should position
* the next service time further away in the tree.
*/
- rb_key = cfq_slice_offset(cfqd, cfqq) + jiffies;
+ rb_key = cfq_slice_offset(cfqd, cfqq) + now;
rb_key -= cfqq->slice_resid;
cfqq->slice_resid = 0;
} else {
- rb_key = -HZ;
+ rb_key = -NSEC_PER_SEC;
__cfqq = cfq_rb_first(st);
- rb_key += __cfqq ? __cfqq->rb_key : jiffies;
+ rb_key += __cfqq ? __cfqq->rb_key : now;
}
if (!RB_EMPTY_NODE(&cfqq->rb_node)) {
@@ -2266,7 +2279,7 @@ static void cfq_service_tree_add(struct cfq_data *cfqd, struct cfq_queue *cfqq,
/*
* sort by key, that represents service time.
*/
- if (time_before(rb_key, __cfqq->rb_key))
+ if (rb_key < __cfqq->rb_key)
p = &parent->rb_left;
else {
p = &parent->rb_right;
@@ -2461,10 +2474,10 @@ static void cfq_reposition_rq_rb(struct cfq_queue *cfqq, struct request *rq)
{
elv_rb_del(&cfqq->sort_list, rq);
cfqq->queued[rq_is_sync(rq)]--;
- cfqg_stats_update_io_remove(RQ_CFQG(rq), rq->cmd_flags);
+ cfqg_stats_update_io_remove(RQ_CFQG(rq), req_op(rq), rq->cmd_flags);
cfq_add_rq_rb(rq);
cfqg_stats_update_io_add(RQ_CFQG(rq), cfqq->cfqd->serving_group,
- rq->cmd_flags);
+ req_op(rq), rq->cmd_flags);
}
static struct request *
@@ -2517,7 +2530,7 @@ static void cfq_remove_request(struct request *rq)
cfq_del_rq_rb(rq);
cfqq->cfqd->rq_queued--;
- cfqg_stats_update_io_remove(RQ_CFQG(rq), rq->cmd_flags);
+ cfqg_stats_update_io_remove(RQ_CFQG(rq), req_op(rq), rq->cmd_flags);
if (rq->cmd_flags & REQ_PRIO) {
WARN_ON(!cfqq->prio_pending);
cfqq->prio_pending--;
@@ -2531,7 +2544,7 @@ static int cfq_merge(struct request_queue *q, struct request **req,
struct request *__rq;
__rq = cfq_find_rq_fmerge(cfqd, bio);
- if (__rq && elv_rq_merge_ok(__rq, bio)) {
+ if (__rq && elv_bio_merge_ok(__rq, bio)) {
*req = __rq;
return ELEVATOR_FRONT_MERGE;
}
@@ -2552,7 +2565,7 @@ static void cfq_merged_request(struct request_queue *q, struct request *req,
static void cfq_bio_merged(struct request_queue *q, struct request *req,
struct bio *bio)
{
- cfqg_stats_update_io_merged(RQ_CFQG(req), bio->bi_rw);
+ cfqg_stats_update_io_merged(RQ_CFQG(req), bio_op(bio), bio->bi_rw);
}
static void
@@ -2566,7 +2579,7 @@ cfq_merged_requests(struct request_queue *q, struct request *rq,
* reposition in fifo if next is older than rq
*/
if (!list_empty(&rq->queuelist) && !list_empty(&next->queuelist) &&
- time_before(next->fifo_time, rq->fifo_time) &&
+ next->fifo_time < rq->fifo_time &&
cfqq == RQ_CFQQ(next)) {
list_move(&rq->queuelist, &next->queuelist);
rq->fifo_time = next->fifo_time;
@@ -2575,7 +2588,7 @@ cfq_merged_requests(struct request_queue *q, struct request *rq,
if (cfqq->next_rq == next)
cfqq->next_rq = rq;
cfq_remove_request(next);
- cfqg_stats_update_io_merged(RQ_CFQG(rq), next->cmd_flags);
+ cfqg_stats_update_io_merged(RQ_CFQG(rq), req_op(next), next->cmd_flags);
cfqq = RQ_CFQQ(next);
/*
@@ -2588,8 +2601,8 @@ cfq_merged_requests(struct request_queue *q, struct request *rq,
cfq_del_cfqq_rr(cfqd, cfqq);
}
-static int cfq_allow_merge(struct request_queue *q, struct request *rq,
- struct bio *bio)
+static int cfq_allow_bio_merge(struct request_queue *q, struct request *rq,
+ struct bio *bio)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
struct cfq_io_cq *cic;
@@ -2613,9 +2626,15 @@ static int cfq_allow_merge(struct request_queue *q, struct request *rq,
return cfqq == RQ_CFQQ(rq);
}
+static int cfq_allow_rq_merge(struct request_queue *q, struct request *rq,
+ struct request *next)
+{
+ return RQ_CFQQ(rq) == RQ_CFQQ(next);
+}
+
static inline void cfq_del_timer(struct cfq_data *cfqd, struct cfq_queue *cfqq)
{
- del_timer(&cfqd->idle_slice_timer);
+ hrtimer_try_to_cancel(&cfqd->idle_slice_timer);
cfqg_stats_update_idle_time(cfqq->cfqg);
}
@@ -2627,7 +2646,7 @@ static void __cfq_set_active_queue(struct cfq_data *cfqd,
cfqd->serving_wl_class, cfqd->serving_wl_type);
cfqg_stats_update_avg_queue_size(cfqq->cfqg);
cfqq->slice_start = 0;
- cfqq->dispatch_start = jiffies;
+ cfqq->dispatch_start = ktime_get_ns();
cfqq->allocated_slice = 0;
cfqq->slice_end = 0;
cfqq->slice_dispatch = 0;
@@ -2676,8 +2695,8 @@ __cfq_slice_expired(struct cfq_data *cfqd, struct cfq_queue *cfqq,
if (cfq_cfqq_slice_new(cfqq))
cfqq->slice_resid = cfq_scaled_cfqq_slice(cfqd, cfqq);
else
- cfqq->slice_resid = cfqq->slice_end - jiffies;
- cfq_log_cfqq(cfqd, cfqq, "resid=%ld", cfqq->slice_resid);
+ cfqq->slice_resid = cfqq->slice_end - ktime_get_ns();
+ cfq_log_cfqq(cfqd, cfqq, "resid=%lld", cfqq->slice_resid);
}
cfq_group_served(cfqd, cfqq->cfqg, cfqq);
@@ -2911,7 +2930,8 @@ static void cfq_arm_slice_timer(struct cfq_data *cfqd)
struct cfq_queue *cfqq = cfqd->active_queue;
struct cfq_rb_root *st = cfqq->service_tree;
struct cfq_io_cq *cic;
- unsigned long sl, group_idle = 0;
+ u64 sl, group_idle = 0;
+ u64 now = ktime_get_ns();
/*
* SSD device without seek penalty, disable idling. But only do so
@@ -2954,8 +2974,8 @@ static void cfq_arm_slice_timer(struct cfq_data *cfqd)
* time slice.
*/
if (sample_valid(cic->ttime.ttime_samples) &&
- (cfqq->slice_end - jiffies < cic->ttime.ttime_mean)) {
- cfq_log_cfqq(cfqd, cfqq, "Not idling. think_time:%lu",
+ (cfqq->slice_end - now < cic->ttime.ttime_mean)) {
+ cfq_log_cfqq(cfqd, cfqq, "Not idling. think_time:%llu",
cic->ttime.ttime_mean);
return;
}
@@ -2976,9 +2996,10 @@ static void cfq_arm_slice_timer(struct cfq_data *cfqd)
else
sl = cfqd->cfq_slice_idle;
- mod_timer(&cfqd->idle_slice_timer, jiffies + sl);
+ hrtimer_start(&cfqd->idle_slice_timer, ns_to_ktime(sl),
+ HRTIMER_MODE_REL);
cfqg_stats_set_start_idle_time(cfqq->cfqg);
- cfq_log_cfqq(cfqd, cfqq, "arm_idle: %lu group_idle: %d", sl,
+ cfq_log_cfqq(cfqd, cfqq, "arm_idle: %llu group_idle: %d", sl,
group_idle ? 1 : 0);
}
@@ -3018,7 +3039,7 @@ static struct request *cfq_check_fifo(struct cfq_queue *cfqq)
return NULL;
rq = rq_entry_fifo(cfqq->fifo.next);
- if (time_before(jiffies, rq->fifo_time))
+ if (ktime_get_ns() < rq->fifo_time)
rq = NULL;
cfq_log_cfqq(cfqq->cfqd, cfqq, "fifo=%p", rq);
@@ -3096,14 +3117,14 @@ static enum wl_type_t cfq_choose_wl_type(struct cfq_data *cfqd,
struct cfq_queue *queue;
int i;
bool key_valid = false;
- unsigned long lowest_key = 0;
+ u64 lowest_key = 0;
enum wl_type_t cur_best = SYNC_NOIDLE_WORKLOAD;
for (i = 0; i <= SYNC_WORKLOAD; ++i) {
/* select the one with lowest rb_key */
queue = cfq_rb_first(st_for(cfqg, wl_class, i));
if (queue &&
- (!key_valid || time_before(queue->rb_key, lowest_key))) {
+ (!key_valid || queue->rb_key < lowest_key)) {
lowest_key = queue->rb_key;
cur_best = i;
key_valid = true;
@@ -3116,11 +3137,12 @@ static enum wl_type_t cfq_choose_wl_type(struct cfq_data *cfqd,
static void
choose_wl_class_and_type(struct cfq_data *cfqd, struct cfq_group *cfqg)
{
- unsigned slice;
+ u64 slice;
unsigned count;
struct cfq_rb_root *st;
- unsigned group_slice;
+ u64 group_slice;
enum wl_class_t original_class = cfqd->serving_wl_class;
+ u64 now = ktime_get_ns();
/* Choose next priority. RT > BE > IDLE */
if (cfq_group_busy_queues_wl(RT_WORKLOAD, cfqd, cfqg))
@@ -3129,7 +3151,7 @@ choose_wl_class_and_type(struct cfq_data *cfqd, struct cfq_group *cfqg)
cfqd->serving_wl_class = BE_WORKLOAD;
else {
cfqd->serving_wl_class = IDLE_WORKLOAD;
- cfqd->workload_expires = jiffies + 1;
+ cfqd->workload_expires = now + jiffies_to_nsecs(1);
return;
}
@@ -3147,7 +3169,7 @@ choose_wl_class_and_type(struct cfq_data *cfqd, struct cfq_group *cfqg)
/*
* check workload expiration, and that we still have other queues ready
*/
- if (count && !time_after(jiffies, cfqd->workload_expires))
+ if (count && !(now > cfqd->workload_expires))
return;
new_workload:
@@ -3164,13 +3186,13 @@ new_workload:
*/
group_slice = cfq_group_slice(cfqd, cfqg);
- slice = group_slice * count /
+ slice = div_u64(group_slice * count,
max_t(unsigned, cfqg->busy_queues_avg[cfqd->serving_wl_class],
cfq_group_busy_queues_wl(cfqd->serving_wl_class, cfqd,
- cfqg));
+ cfqg)));
if (cfqd->serving_wl_type == ASYNC_WORKLOAD) {
- unsigned int tmp;
+ u64 tmp;
/*
* Async queues are currently system wide. Just taking
@@ -3181,19 +3203,19 @@ new_workload:
*/
tmp = cfqd->cfq_target_latency *
cfqg_busy_async_queues(cfqd, cfqg);
- tmp = tmp/cfqd->busy_queues;
- slice = min_t(unsigned, slice, tmp);
+ tmp = div_u64(tmp, cfqd->busy_queues);
+ slice = min_t(u64, slice, tmp);
/* async workload slice is scaled down according to
* the sync/async slice ratio. */
- slice = slice * cfqd->cfq_slice[0] / cfqd->cfq_slice[1];
+ slice = div64_u64(slice*cfqd->cfq_slice[0], cfqd->cfq_slice[1]);
} else
/* sync workload slice is at least 2 * cfq_slice_idle */
slice = max(slice, 2 * cfqd->cfq_slice_idle);
- slice = max_t(unsigned, slice, CFQ_MIN_TT);
- cfq_log(cfqd, "workload slice:%d", slice);
- cfqd->workload_expires = jiffies + slice;
+ slice = max_t(u64, slice, CFQ_MIN_TT);
+ cfq_log(cfqd, "workload slice:%llu", slice);
+ cfqd->workload_expires = now + slice;
}
static struct cfq_group *cfq_get_next_cfqg(struct cfq_data *cfqd)
@@ -3211,16 +3233,17 @@ static struct cfq_group *cfq_get_next_cfqg(struct cfq_data *cfqd)
static void cfq_choose_cfqg(struct cfq_data *cfqd)
{
struct cfq_group *cfqg = cfq_get_next_cfqg(cfqd);
+ u64 now = ktime_get_ns();
cfqd->serving_group = cfqg;
/* Restore the workload type data */
if (cfqg->saved_wl_slice) {
- cfqd->workload_expires = jiffies + cfqg->saved_wl_slice;
+ cfqd->workload_expires = now + cfqg->saved_wl_slice;
cfqd->serving_wl_type = cfqg->saved_wl_type;
cfqd->serving_wl_class = cfqg->saved_wl_class;
} else
- cfqd->workload_expires = jiffies - 1;
+ cfqd->workload_expires = now - 1;
choose_wl_class_and_type(cfqd, cfqg);
}
@@ -3232,6 +3255,7 @@ static void cfq_choose_cfqg(struct cfq_data *cfqd)
static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd)
{
struct cfq_queue *cfqq, *new_cfqq = NULL;
+ u64 now = ktime_get_ns();
cfqq = cfqd->active_queue;
if (!cfqq)
@@ -3292,7 +3316,7 @@ static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd)
* flight or is idling for a new request, allow either of these
* conditions to happen (or time out) before selecting a new queue.
*/
- if (timer_pending(&cfqd->idle_slice_timer)) {
+ if (hrtimer_active(&cfqd->idle_slice_timer)) {
cfqq = NULL;
goto keep_queue;
}
@@ -3303,7 +3327,7 @@ static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd)
**/
if (CFQQ_SEEKY(cfqq) && cfq_cfqq_idle_window(cfqq) &&
(cfq_cfqq_slice_new(cfqq) ||
- (cfqq->slice_end - jiffies > jiffies - cfqq->slice_start))) {
+ (cfqq->slice_end - now > now - cfqq->slice_start))) {
cfq_clear_cfqq_deep(cfqq);
cfq_clear_cfqq_idle_window(cfqq);
}
@@ -3381,11 +3405,12 @@ static int cfq_forced_dispatch(struct cfq_data *cfqd)
static inline bool cfq_slice_used_soon(struct cfq_data *cfqd,
struct cfq_queue *cfqq)
{
+ u64 now = ktime_get_ns();
+
/* the queue hasn't finished any request, can't estimate */
if (cfq_cfqq_slice_new(cfqq))
return true;
- if (time_after(jiffies + cfqd->cfq_slice_idle * cfqq->dispatched,
- cfqq->slice_end))
+ if (now + cfqd->cfq_slice_idle * cfqq->dispatched > cfqq->slice_end)
return true;
return false;
@@ -3460,10 +3485,10 @@ static bool cfq_may_dispatch(struct cfq_data *cfqd, struct cfq_queue *cfqq)
* based on the last sync IO we serviced
*/
if (!cfq_cfqq_sync(cfqq) && cfqd->cfq_latency) {
- unsigned long last_sync = jiffies - cfqd->last_delayed_sync;
+ u64 last_sync = ktime_get_ns() - cfqd->last_delayed_sync;
unsigned int depth;
- depth = last_sync / cfqd->cfq_slice[1];
+ depth = div64_u64(last_sync, cfqd->cfq_slice[1]);
if (!depth && !cfqq->dispatched)
depth = 1;
if (depth < max_dispatch)
@@ -3546,7 +3571,7 @@ static int cfq_dispatch_requests(struct request_queue *q, int force)
if (cfqd->busy_queues > 1 && ((!cfq_cfqq_sync(cfqq) &&
cfqq->slice_dispatch >= cfq_prio_to_maxrq(cfqd, cfqq)) ||
cfq_class_idle(cfqq))) {
- cfqq->slice_end = jiffies + 1;
+ cfqq->slice_end = ktime_get_ns() + 1;
cfq_slice_expired(cfqd, 0);
}
@@ -3624,7 +3649,7 @@ static void cfq_init_icq(struct io_cq *icq)
{
struct cfq_io_cq *cic = icq_to_cic(icq);
- cic->ttime.last_end_request = jiffies;
+ cic->ttime.last_end_request = ktime_get_ns();
}
static void cfq_exit_icq(struct io_cq *icq)
@@ -3682,6 +3707,7 @@ static void cfq_init_prio_data(struct cfq_queue *cfqq, struct cfq_io_cq *cic)
* elevate the priority of this queue
*/
cfqq->org_ioprio = cfqq->ioprio;
+ cfqq->org_ioprio_class = cfqq->ioprio_class;
cfq_clear_cfqq_prio_changed(cfqq);
}
@@ -3845,14 +3871,15 @@ out:
}
static void
-__cfq_update_io_thinktime(struct cfq_ttime *ttime, unsigned long slice_idle)
+__cfq_update_io_thinktime(struct cfq_ttime *ttime, u64 slice_idle)
{
- unsigned long elapsed = jiffies - ttime->last_end_request;
+ u64 elapsed = ktime_get_ns() - ttime->last_end_request;
elapsed = min(elapsed, 2UL * slice_idle);
ttime->ttime_samples = (7*ttime->ttime_samples + 256) / 8;
- ttime->ttime_total = (7*ttime->ttime_total + 256*elapsed) / 8;
- ttime->ttime_mean = (ttime->ttime_total + 128) / ttime->ttime_samples;
+ ttime->ttime_total = div_u64(7*ttime->ttime_total + 256*elapsed, 8);
+ ttime->ttime_mean = div64_ul(ttime->ttime_total + 128,
+ ttime->ttime_samples);
}
static void
@@ -4105,10 +4132,10 @@ static void cfq_insert_request(struct request_queue *q, struct request *rq)
cfq_log_cfqq(cfqd, cfqq, "insert_request");
cfq_init_prio_data(cfqq, RQ_CIC(rq));
- rq->fifo_time = jiffies + cfqd->cfq_fifo_expire[rq_is_sync(rq)];
+ rq->fifo_time = ktime_get_ns() + cfqd->cfq_fifo_expire[rq_is_sync(rq)];
list_add_tail(&rq->queuelist, &cfqq->fifo);
cfq_add_rq_rb(rq);
- cfqg_stats_update_io_add(RQ_CFQG(rq), cfqd->serving_group,
+ cfqg_stats_update_io_add(RQ_CFQG(rq), cfqd->serving_group, req_op(rq),
rq->cmd_flags);
cfq_rq_enqueued(cfqd, cfqq, rq);
}
@@ -4153,6 +4180,7 @@ static void cfq_update_hw_tag(struct cfq_data *cfqd)
static bool cfq_should_wait_busy(struct cfq_data *cfqd, struct cfq_queue *cfqq)
{
struct cfq_io_cq *cic = cfqd->active_cic;
+ u64 now = ktime_get_ns();
/* If the queue already has requests, don't wait */
if (!RB_EMPTY_ROOT(&cfqq->sort_list))
@@ -4171,7 +4199,7 @@ static bool cfq_should_wait_busy(struct cfq_data *cfqd, struct cfq_queue *cfqq)
/* if slice left is less than think time, wait busy */
if (cic && sample_valid(cic->ttime.ttime_samples)
- && (cfqq->slice_end - jiffies < cic->ttime.ttime_mean))
+ && (cfqq->slice_end - now < cic->ttime.ttime_mean))
return true;
/*
@@ -4181,7 +4209,7 @@ static bool cfq_should_wait_busy(struct cfq_data *cfqd, struct cfq_queue *cfqq)
* case where think time is less than a jiffy, mark the queue wait
* busy if only 1 jiffy is left in the slice.
*/
- if (cfqq->slice_end - jiffies == 1)
+ if (cfqq->slice_end - now <= jiffies_to_nsecs(1))
return true;
return false;
@@ -4192,9 +4220,8 @@ static void cfq_completed_request(struct request_queue *q, struct request *rq)
struct cfq_queue *cfqq = RQ_CFQQ(rq);
struct cfq_data *cfqd = cfqq->cfqd;
const int sync = rq_is_sync(rq);
- unsigned long now;
+ u64 now = ktime_get_ns();
- now = jiffies;
cfq_log_cfqq(cfqd, cfqq, "complete rqnoidle %d",
!!(rq->cmd_flags & REQ_NOIDLE));
@@ -4206,7 +4233,8 @@ static void cfq_completed_request(struct request_queue *q, struct request *rq)
cfqq->dispatched--;
(RQ_CFQG(rq))->dispatched--;
cfqg_stats_update_completion(cfqq->cfqg, rq_start_time_ns(rq),
- rq_io_start_time_ns(rq), rq->cmd_flags);
+ rq_io_start_time_ns(rq), req_op(rq),
+ rq->cmd_flags);
cfqd->rq_in_flight[cfq_cfqq_sync(cfqq)]--;
@@ -4222,7 +4250,16 @@ static void cfq_completed_request(struct request_queue *q, struct request *rq)
cfqq_type(cfqq));
st->ttime.last_end_request = now;
- if (!time_after(rq->start_time + cfqd->cfq_fifo_expire[1], now))
+ /*
+ * We have to do this check in jiffies since start_time is in
+ * jiffies and it is not trivial to convert to ns. If
+ * cfq_fifo_expire[1] ever comes close to 1 jiffie, this test
+ * will become problematic but so far we are fine (the default
+ * is 128 ms).
+ */
+ if (!time_after(rq->start_time +
+ nsecs_to_jiffies(cfqd->cfq_fifo_expire[1]),
+ jiffies))
cfqd->last_delayed_sync = now;
}
@@ -4247,10 +4284,10 @@ static void cfq_completed_request(struct request_queue *q, struct request *rq)
* the queue.
*/
if (cfq_should_wait_busy(cfqd, cfqq)) {
- unsigned long extend_sl = cfqd->cfq_slice_idle;
+ u64 extend_sl = cfqd->cfq_slice_idle;
if (!cfqd->cfq_slice_idle)
extend_sl = cfqd->cfq_group_idle;
- cfqq->slice_end = jiffies + extend_sl;
+ cfqq->slice_end = now + extend_sl;
cfq_mark_cfqq_wait_busy(cfqq);
cfq_log_cfqq(cfqd, cfqq, "will busy wait");
}
@@ -4275,6 +4312,24 @@ static void cfq_completed_request(struct request_queue *q, struct request *rq)
cfq_schedule_dispatch(cfqd);
}
+static void cfqq_boost_on_prio(struct cfq_queue *cfqq, int op_flags)
+{
+ /*
+ * If REQ_PRIO is set, boost class and prio level, if it's below
+ * BE/NORM. If prio is not set, restore the potentially boosted
+ * class/prio level.
+ */
+ if (!(op_flags & REQ_PRIO)) {
+ cfqq->ioprio_class = cfqq->org_ioprio_class;
+ cfqq->ioprio = cfqq->org_ioprio;
+ } else {
+ if (cfq_class_idle(cfqq))
+ cfqq->ioprio_class = IOPRIO_CLASS_BE;
+ if (cfqq->ioprio > IOPRIO_NORM)
+ cfqq->ioprio = IOPRIO_NORM;
+ }
+}
+
static inline int __cfq_may_queue(struct cfq_queue *cfqq)
{
if (cfq_cfqq_wait_request(cfqq) && !cfq_cfqq_must_alloc_slice(cfqq)) {
@@ -4285,7 +4340,7 @@ static inline int __cfq_may_queue(struct cfq_queue *cfqq)
return ELV_MQUEUE_MAY;
}
-static int cfq_may_queue(struct request_queue *q, int rw)
+static int cfq_may_queue(struct request_queue *q, int op, int op_flags)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
struct task_struct *tsk = current;
@@ -4302,9 +4357,10 @@ static int cfq_may_queue(struct request_queue *q, int rw)
if (!cic)
return ELV_MQUEUE_MAY;
- cfqq = cic_to_cfqq(cic, rw_is_sync(rw));
+ cfqq = cic_to_cfqq(cic, rw_is_sync(op, op_flags));
if (cfqq) {
cfq_init_prio_data(cfqq, cic);
+ cfqq_boost_on_prio(cfqq, op_flags);
return __cfq_may_queue(cfqq);
}
@@ -4435,9 +4491,10 @@ static void cfq_kick_queue(struct work_struct *work)
/*
* Timer running if the active_queue is currently idling inside its time slice
*/
-static void cfq_idle_slice_timer(unsigned long data)
+static enum hrtimer_restart cfq_idle_slice_timer(struct hrtimer *timer)
{
- struct cfq_data *cfqd = (struct cfq_data *) data;
+ struct cfq_data *cfqd = container_of(timer, struct cfq_data,
+ idle_slice_timer);
struct cfq_queue *cfqq;
unsigned long flags;
int timed_out = 1;
@@ -4486,11 +4543,12 @@ out_kick:
cfq_schedule_dispatch(cfqd);
out_cont:
spin_unlock_irqrestore(cfqd->queue->queue_lock, flags);
+ return HRTIMER_NORESTART;
}
static void cfq_shutdown_timer_wq(struct cfq_data *cfqd)
{
- del_timer_sync(&cfqd->idle_slice_timer);
+ hrtimer_cancel(&cfqd->idle_slice_timer);
cancel_work_sync(&cfqd->unplug_work);
}
@@ -4586,9 +4644,9 @@ static int cfq_init_queue(struct request_queue *q, struct elevator_type *e)
cfqg_put(cfqd->root_group);
spin_unlock_irq(q->queue_lock);
- init_timer(&cfqd->idle_slice_timer);
+ hrtimer_init(&cfqd->idle_slice_timer, CLOCK_MONOTONIC,
+ HRTIMER_MODE_REL);
cfqd->idle_slice_timer.function = cfq_idle_slice_timer;
- cfqd->idle_slice_timer.data = (unsigned long) cfqd;
INIT_WORK(&cfqd->unplug_work, cfq_kick_queue);
@@ -4609,7 +4667,7 @@ static int cfq_init_queue(struct request_queue *q, struct elevator_type *e)
* we optimistically start assuming sync ops weren't delayed in last
* second, in order to have larger depth for async operations.
*/
- cfqd->last_delayed_sync = jiffies - HZ;
+ cfqd->last_delayed_sync = ktime_get_ns() - NSEC_PER_SEC;
return 0;
out_free:
@@ -4652,9 +4710,9 @@ cfq_var_store(unsigned int *var, const char *page, size_t count)
static ssize_t __FUNC(struct elevator_queue *e, char *page) \
{ \
struct cfq_data *cfqd = e->elevator_data; \
- unsigned int __data = __VAR; \
+ u64 __data = __VAR; \
if (__CONV) \
- __data = jiffies_to_msecs(__data); \
+ __data = div_u64(__data, NSEC_PER_MSEC); \
return cfq_var_show(__data, (page)); \
}
SHOW_FUNCTION(cfq_quantum_show, cfqd->cfq_quantum, 0);
@@ -4671,6 +4729,21 @@ SHOW_FUNCTION(cfq_low_latency_show, cfqd->cfq_latency, 0);
SHOW_FUNCTION(cfq_target_latency_show, cfqd->cfq_target_latency, 1);
#undef SHOW_FUNCTION
+#define USEC_SHOW_FUNCTION(__FUNC, __VAR) \
+static ssize_t __FUNC(struct elevator_queue *e, char *page) \
+{ \
+ struct cfq_data *cfqd = e->elevator_data; \
+ u64 __data = __VAR; \
+ __data = div_u64(__data, NSEC_PER_USEC); \
+ return cfq_var_show(__data, (page)); \
+}
+USEC_SHOW_FUNCTION(cfq_slice_idle_us_show, cfqd->cfq_slice_idle);
+USEC_SHOW_FUNCTION(cfq_group_idle_us_show, cfqd->cfq_group_idle);
+USEC_SHOW_FUNCTION(cfq_slice_sync_us_show, cfqd->cfq_slice[1]);
+USEC_SHOW_FUNCTION(cfq_slice_async_us_show, cfqd->cfq_slice[0]);
+USEC_SHOW_FUNCTION(cfq_target_latency_us_show, cfqd->cfq_target_latency);
+#undef USEC_SHOW_FUNCTION
+
#define STORE_FUNCTION(__FUNC, __PTR, MIN, MAX, __CONV) \
static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count) \
{ \
@@ -4682,7 +4755,7 @@ static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count)
else if (__data > (MAX)) \
__data = (MAX); \
if (__CONV) \
- *(__PTR) = msecs_to_jiffies(__data); \
+ *(__PTR) = (u64)__data * NSEC_PER_MSEC; \
else \
*(__PTR) = __data; \
return ret; \
@@ -4705,6 +4778,26 @@ STORE_FUNCTION(cfq_low_latency_store, &cfqd->cfq_latency, 0, 1, 0);
STORE_FUNCTION(cfq_target_latency_store, &cfqd->cfq_target_latency, 1, UINT_MAX, 1);
#undef STORE_FUNCTION
+#define USEC_STORE_FUNCTION(__FUNC, __PTR, MIN, MAX) \
+static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count) \
+{ \
+ struct cfq_data *cfqd = e->elevator_data; \
+ unsigned int __data; \
+ int ret = cfq_var_store(&__data, (page), count); \
+ if (__data < (MIN)) \
+ __data = (MIN); \
+ else if (__data > (MAX)) \
+ __data = (MAX); \
+ *(__PTR) = (u64)__data * NSEC_PER_USEC; \
+ return ret; \
+}
+USEC_STORE_FUNCTION(cfq_slice_idle_us_store, &cfqd->cfq_slice_idle, 0, UINT_MAX);
+USEC_STORE_FUNCTION(cfq_group_idle_us_store, &cfqd->cfq_group_idle, 0, UINT_MAX);
+USEC_STORE_FUNCTION(cfq_slice_sync_us_store, &cfqd->cfq_slice[1], 1, UINT_MAX);
+USEC_STORE_FUNCTION(cfq_slice_async_us_store, &cfqd->cfq_slice[0], 1, UINT_MAX);
+USEC_STORE_FUNCTION(cfq_target_latency_us_store, &cfqd->cfq_target_latency, 1, UINT_MAX);
+#undef USEC_STORE_FUNCTION
+
#define CFQ_ATTR(name) \
__ATTR(name, S_IRUGO|S_IWUSR, cfq_##name##_show, cfq_##name##_store)
@@ -4715,12 +4808,17 @@ static struct elv_fs_entry cfq_attrs[] = {
CFQ_ATTR(back_seek_max),
CFQ_ATTR(back_seek_penalty),
CFQ_ATTR(slice_sync),
+ CFQ_ATTR(slice_sync_us),
CFQ_ATTR(slice_async),
+ CFQ_ATTR(slice_async_us),
CFQ_ATTR(slice_async_rq),
CFQ_ATTR(slice_idle),
+ CFQ_ATTR(slice_idle_us),
CFQ_ATTR(group_idle),
+ CFQ_ATTR(group_idle_us),
CFQ_ATTR(low_latency),
CFQ_ATTR(target_latency),
+ CFQ_ATTR(target_latency_us),
__ATTR_NULL
};
@@ -4729,7 +4827,8 @@ static struct elevator_type iosched_cfq = {
.elevator_merge_fn = cfq_merge,
.elevator_merged_fn = cfq_merged_request,
.elevator_merge_req_fn = cfq_merged_requests,
- .elevator_allow_merge_fn = cfq_allow_merge,
+ .elevator_allow_bio_merge_fn = cfq_allow_bio_merge,
+ .elevator_allow_rq_merge_fn = cfq_allow_rq_merge,
.elevator_bio_merged_fn = cfq_bio_merged,
.elevator_dispatch_fn = cfq_dispatch_requests,
.elevator_add_req_fn = cfq_insert_request,
@@ -4776,18 +4875,7 @@ static int __init cfq_init(void)
{
int ret;
- /*
- * could be 0 on HZ < 1000 setups
- */
- if (!cfq_slice_async)
- cfq_slice_async = 1;
- if (!cfq_slice_idle)
- cfq_slice_idle = 1;
-
#ifdef CONFIG_CFQ_GROUP_IOSCHED
- if (!cfq_group_idle)
- cfq_group_idle = 1;
-
ret = blkcg_policy_register(&blkcg_policy_cfq);
if (ret)
return ret;
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index d0dd7882d8c7..55e0bb6d7da7 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -137,7 +137,7 @@ deadline_merge(struct request_queue *q, struct request **req, struct bio *bio)
if (__rq) {
BUG_ON(sector != blk_rq_pos(__rq));
- if (elv_rq_merge_ok(__rq, bio)) {
+ if (elv_bio_merge_ok(__rq, bio)) {
ret = ELEVATOR_FRONT_MERGE;
goto out;
}
@@ -173,7 +173,8 @@ deadline_merged_requests(struct request_queue *q, struct request *req,
* and move into next position (next will be deleted) in fifo
*/
if (!list_empty(&req->queuelist) && !list_empty(&next->queuelist)) {
- if (time_before(next->fifo_time, req->fifo_time)) {
+ if (time_before((unsigned long)next->fifo_time,
+ (unsigned long)req->fifo_time)) {
list_move(&req->queuelist, &next->queuelist);
req->fifo_time = next->fifo_time;
}
@@ -227,7 +228,7 @@ static inline int deadline_check_fifo(struct deadline_data *dd, int ddir)
/*
* rq is expired!
*/
- if (time_after_eq(jiffies, rq->fifo_time))
+ if (time_after_eq(jiffies, (unsigned long)rq->fifo_time))
return 1;
return 0;
diff --git a/block/elevator.c b/block/elevator.c
index c3555c9c672f..7096c22041e7 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -53,13 +53,13 @@ static LIST_HEAD(elv_list);
* Query io scheduler to see if the current process issuing bio may be
* merged with rq.
*/
-static int elv_iosched_allow_merge(struct request *rq, struct bio *bio)
+static int elv_iosched_allow_bio_merge(struct request *rq, struct bio *bio)
{
struct request_queue *q = rq->q;
struct elevator_queue *e = q->elevator;
- if (e->type->ops.elevator_allow_merge_fn)
- return e->type->ops.elevator_allow_merge_fn(q, rq, bio);
+ if (e->type->ops.elevator_allow_bio_merge_fn)
+ return e->type->ops.elevator_allow_bio_merge_fn(q, rq, bio);
return 1;
}
@@ -67,17 +67,17 @@ static int elv_iosched_allow_merge(struct request *rq, struct bio *bio)
/*
* can we safely merge with this request?
*/
-bool elv_rq_merge_ok(struct request *rq, struct bio *bio)
+bool elv_bio_merge_ok(struct request *rq, struct bio *bio)
{
if (!blk_rq_merge_ok(rq, bio))
- return 0;
+ return false;
- if (!elv_iosched_allow_merge(rq, bio))
- return 0;
+ if (!elv_iosched_allow_bio_merge(rq, bio))
+ return false;
- return 1;
+ return true;
}
-EXPORT_SYMBOL(elv_rq_merge_ok);
+EXPORT_SYMBOL(elv_bio_merge_ok);
static struct elevator_type *elevator_find(const char *name)
{
@@ -366,8 +366,7 @@ void elv_dispatch_sort(struct request_queue *q, struct request *rq)
list_for_each_prev(entry, &q->queue_head) {
struct request *pos = list_entry_rq(entry);
- if ((rq->cmd_flags & REQ_DISCARD) !=
- (pos->cmd_flags & REQ_DISCARD))
+ if ((req_op(rq) == REQ_OP_DISCARD) != (req_op(pos) == REQ_OP_DISCARD))
break;
if (rq_data_dir(rq) != rq_data_dir(pos))
break;
@@ -426,7 +425,7 @@ int elv_merge(struct request_queue *q, struct request **req, struct bio *bio)
/*
* First try one-hit cache.
*/
- if (q->last_merge && elv_rq_merge_ok(q->last_merge, bio)) {
+ if (q->last_merge && elv_bio_merge_ok(q->last_merge, bio)) {
ret = blk_try_merge(q->last_merge, bio);
if (ret != ELEVATOR_NO_MERGE) {
*req = q->last_merge;
@@ -441,7 +440,7 @@ int elv_merge(struct request_queue *q, struct request **req, struct bio *bio)
* See if our hash lookup can find a potential backmerge.
*/
__rq = elv_rqhash_find(q, bio->bi_iter.bi_sector);
- if (__rq && elv_rq_merge_ok(__rq, bio)) {
+ if (__rq && elv_bio_merge_ok(__rq, bio)) {
*req = __rq;
return ELEVATOR_BACK_MERGE;
}
@@ -717,12 +716,12 @@ void elv_put_request(struct request_queue *q, struct request *rq)
e->type->ops.elevator_put_req_fn(rq);
}
-int elv_may_queue(struct request_queue *q, int rw)
+int elv_may_queue(struct request_queue *q, int op, int op_flags)
{
struct elevator_queue *e = q->elevator;
if (e->type->ops.elevator_may_queue_fn)
- return e->type->ops.elevator_may_queue_fn(q, rw);
+ return e->type->ops.elevator_may_queue_fn(q, op, op_flags);
return ELV_MQUEUE_MAY;
}
diff --git a/block/partition-generic.c b/block/partition-generic.c
index d7eb77e1e3a8..71d9ed9df8da 100644
--- a/block/partition-generic.c
+++ b/block/partition-generic.c
@@ -495,7 +495,6 @@ rescan:
/* add partitions */
for (p = 1; p < state->limit; p++) {
sector_t size, from;
- struct partition_meta_info *info = NULL;
size = state->parts[p].size;
if (!size)
@@ -530,8 +529,6 @@ rescan:
}
}
- if (state->parts[p].has_info)
- info = &state->parts[p].info;
part = add_partition(disk, p, from, size,
state->parts[p].flags,
&state->parts[p].info);
diff --git a/block/partitions/atari.c b/block/partitions/atari.c
index 9875b05e80a2..ff1fb93712c1 100644
--- a/block/partitions/atari.c
+++ b/block/partitions/atari.c
@@ -42,6 +42,13 @@ int atari_partition(struct parsed_partitions *state)
int part_fmt = 0; /* 0:unknown, 1:AHDI, 2:ICD/Supra */
#endif
+ /*
+ * ATARI partition scheme supports 512 lba only. If this is not
+ * the case, bail early to avoid miscalculating hd_size.
+ */
+ if (bdev_logical_block_size(state->bdev) != 512)
+ return 0;
+
rs = read_part_sector(state, 0, &sect);
if (!rs)
return -1;