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| author | Jeff Moyer <jmoyer@redhat.com> | 2015-10-20 23:13:51 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-10-21 15:00:48 -0600 |
| commit | 0809e3ac62319dc7534b64f95ac37e230d740e8a (patch) | |
| tree | 70814dd32f930745834e4186445acf8dcbd1e3c1 /block/blk-mq.c | |
| parent | 3380f4589f6d9725e275525fd0580c8ee2b5cbbc (diff) | |
| download | lwn-0809e3ac62319dc7534b64f95ac37e230d740e8a.tar.gz lwn-0809e3ac62319dc7534b64f95ac37e230d740e8a.zip | |
block: fix plug list flushing for nomerge queues
Request queues with merging disabled will not flush the plug list after
BLK_MAX_REQUEST_COUNT requests have been queued, since the code relies
on blk_attempt_plug_merge to compute the request_count. Fix this by
computing the number of queued requests even for nomerge queues.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index d921cd5177f5..9683a561efcd 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1268,9 +1268,12 @@ static void blk_mq_make_request(struct request_queue *q, struct bio *bio) blk_queue_split(q, &bio, q->bio_split); - if (!is_flush_fua && !blk_queue_nomerges(q) && - blk_attempt_plug_merge(q, bio, &request_count, &same_queue_rq)) - return; + if (!is_flush_fua && !blk_queue_nomerges(q)) { + if (blk_attempt_plug_merge(q, bio, &request_count, + &same_queue_rq)) + return; + } else + request_count = blk_plug_queued_count(q); rq = blk_mq_map_request(q, bio, &data); if (unlikely(!rq)) |