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authorJustin TerAvest <teravest@google.com>2011-07-10 22:09:19 +0200
committerJens Axboe <jaxboe@fusionio.com>2011-07-10 22:09:19 +0200
commita07405b7802691d29ab3b23bdc76ee6d006aad0b (patch)
tree8ca155acb56662e9807af2fa91b801b9f0d25495 /block
parent316cc67d5e03801a5ee4ac660a4dfe9e02aed475 (diff)
downloadvexpress-lsk-a07405b7802691d29ab3b23bdc76ee6d006aad0b.tar.gz
cfq: Remove special treatment for metadata rqs.
There is no consistency among filesystems from what bios (or requests) are marked as being metadata. It's interesting to expose this in traces, but we shouldn't schedule the requests differently based on whether or not they're marked as being metadata. Signed-off-by: Justin TerAvest <teravest@google.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'block')
-rw-r--r--block/cfq-iosched.c18
1 files changed, 0 insertions, 18 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index b2e1c75e4fb..762bd509b71 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -129,8 +129,6 @@ struct cfq_queue {
unsigned long slice_end;
long slice_resid;
- /* pending metadata requests */
- int meta_pending;
/* number of requests that are on the dispatch list or inside driver */
int dispatched;
@@ -670,9 +668,6 @@ cfq_choose_req(struct cfq_data *cfqd, struct request *rq1, struct request *rq2,
if (rq_is_sync(rq1) != rq_is_sync(rq2))
return rq_is_sync(rq1) ? rq1 : rq2;
- if ((rq1->cmd_flags ^ rq2->cmd_flags) & REQ_META)
- return rq1->cmd_flags & REQ_META ? rq1 : rq2;
-
s1 = blk_rq_pos(rq1);
s2 = blk_rq_pos(rq2);
@@ -1593,10 +1588,6 @@ static void cfq_remove_request(struct request *rq)
cfqq->cfqd->rq_queued--;
cfq_blkiocg_update_io_remove_stats(&(RQ_CFQG(rq))->blkg,
rq_data_dir(rq), rq_is_sync(rq));
- if (rq->cmd_flags & REQ_META) {
- WARN_ON(!cfqq->meta_pending);
- cfqq->meta_pending--;
- }
}
static int cfq_merge(struct request_queue *q, struct request **req,
@@ -3335,13 +3326,6 @@ cfq_should_preempt(struct cfq_data *cfqd, struct cfq_queue *new_cfqq,
return true;
/*
- * So both queues are sync. Let the new request get disk time if
- * it's a metadata request and the current queue is doing regular IO.
- */
- if ((rq->cmd_flags & REQ_META) && !cfqq->meta_pending)
- return true;
-
- /*
* Allow an RT request to pre-empt an ongoing non-RT cfqq timeslice.
*/
if (cfq_class_rt(new_cfqq) && !cfq_class_rt(cfqq))
@@ -3405,8 +3389,6 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue *cfqq,
struct cfq_io_context *cic = RQ_CIC(rq);
cfqd->rq_queued++;
- if (rq->cmd_flags & REQ_META)
- cfqq->meta_pending++;
cfq_update_io_thinktime(cfqd, cic);
cfq_update_io_seektime(cfqd, cfqq, rq);