path: root/block/blk-merge.c
diff options
authorTejun Heo <tj@kernel.org>2008-08-25 19:56:14 +0900
committerJens Axboe <jens.axboe@oracle.com>2008-10-09 08:56:08 +0200
commit074a7aca7afa6f230104e8e65eba3420263714a5 (patch)
treef418313e45bd55be8156c8a3e8f9a216cf63058d /block/blk-merge.c
parenteddb2e26b5ee3c5da68ba4bf1921ba20e2097bff (diff)
block: move stats from disk to part0
Move stats related fields - stamp, in_flight, dkstats - from disk to part0 and unify stat handling such that... * part_stat_*() now updates part0 together if the specified partition is not part0. ie. part_stat_*() are now essentially all_stat_*(). * {disk|all}_stat_*() are gone. * part_round_stats() is updated similary. It handles part0 stats automatically and disk_round_stats() is killed. * part_{inc|dec}_in_fligh() is implemented which automatically updates part0 stats for parts other than part0. * disk_map_sector_rcu() is updated to return part0 if no part matches. Combined with the above changes, this makes NULL special case handling in callers unnecessary. * Separate stats show code paths for disk are collapsed into part stats show code paths. * Rename disk_stat_lock/unlock() to part_stat_lock/unlock() While at it, reposition stat handling macros a bit and add missing parentheses around macro parameters. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-merge.c')
1 files changed, 4 insertions, 8 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c
index d926a24bf1fd..c77196d55899 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -390,17 +390,13 @@ static int attempt_merge(struct request_queue *q, struct request *req,
struct hd_struct *part;
int cpu;
- cpu = disk_stat_lock();
+ cpu = part_stat_lock();
part = disk_map_sector_rcu(req->rq_disk, req->sector);
- disk_round_stats(cpu, req->rq_disk);
- req->rq_disk->in_flight--;
- if (part) {
- part_round_stats(cpu, part);
- part->in_flight--;
- }
+ part_round_stats(cpu, part);
+ part_dec_in_flight(part);
- disk_stat_unlock();
+ part_stat_unlock();
req->ioprio = ioprio_best(req->ioprio, next->ioprio);