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blk-mq: I/O and timer unplugs are inverted in blktrace

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trace_block_unplug() takes true for explicit unplugs and false for
implicit unplugs.  schedule() unplugs are implicit and should be
reported as timer unplugs.  While correct in the legacy code, this has
been inverted in blk-mq since 4.11.

Cc: [email protected]
Fixes: bd166ef183 ("blk-mq-sched: add framework for MQ capable IO schedulers")
Reviewed-by: Omar Sandoval <[email protected]>
Signed-off-by: Ilya Dryomov <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Ilya Dryomov 2018-09-26 14:35:50 +02:00 • committed by Jens Axboe
commit 587562d0c7
1 changed files with 2 additions and 2 deletions
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4
block/blk-mq.c
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@ -1628,7 +1628,7 @@ void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule)
BUG_ON(!rq->q);
if (rq->mq_ctx != this_ctx) {
if (this_ctx) {
trace_block_unplug(this_q, depth, from_schedule);
trace_block_unplug(this_q, depth, !from_schedule);
blk_mq_sched_insert_requests(this_q, this_ctx,
&ctx_list,
from_schedule);
@ -1648,7 +1648,7 @@ void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule)
* on 'ctx_list'. Do those.
*/
if (this_ctx) {
trace_block_unplug(this_q, depth, from_schedule);
trace_block_unplug(this_q, depth, !from_schedule);
blk_mq_sched_insert_requests(this_q, this_ctx, &ctx_list,
from_schedule);
}