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authorJens Axboe <jens.axboe@oracle.com>2009-04-24 10:12:19 +0400
committerJens Axboe <jens.axboe@oracle.com>2009-04-28 09:37:37 +0400
commitc69d48540c201394d08cb4d48b905e001313d9b8 (patch)
tree6ad78b44cd7fc5d65a0c3bded49f8cb14f4790a9
parentc2553b5844b06910435e40cfab9e6f384840cb97 (diff)
downloadlinux-c69d48540c201394d08cb4d48b905e001313d9b8.tar.xz
block: include discard requests in IO accounting
We currently don't do merging on discard requests, but we potentially could. If we do, then we need to include discard requests in the IO accounting, or merging would end up decrementing in_flight IO counters for an IO which never incremented them. So enable accounting for discard requests. Problem found by Nikanth Karthikesan <knikanth@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
-rw-r--r--block/blk.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/block/blk.h b/block/blk.h
index 404c10b25ca1..51115599df9b 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -158,7 +158,8 @@ static inline int blk_cpu_to_group(int cpu)
*/
static inline int blk_do_io_stat(struct request *rq)
{
- return rq->rq_disk && blk_rq_io_stat(rq) && blk_fs_request(rq);
+ return rq->rq_disk && blk_rq_io_stat(rq) && blk_fs_request(rq) &&
+ blk_discard_rq(rq);
}
#endif