Commit 676d0607 authored Oct 20, 2015 by Ming Lei Committed by Jens Axboe Oct 21, 2015

blk-mq: fix for trace_block_plug()



The trace point is for tracing plug event of each request
queue instead of each task, so we should check the request
count in the plug list from current queue instead of
current task.

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

parent 7460d389

block/blk-mq.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1380,7 +1380,7 @@ static void blk_sq_make_request(struct request_queue q, struct bio bio)
		plug = current->plug;
		if (plug) {
		blk_mq_bio_to_request(rq, bio);
		if (list_empty(&plug->mq_list))
		if (!request_count)
		trace_block_plug(q);
		else if (request_count >= BLK_MAX_REQUEST_COUNT) {
		blk_flush_plug_list(plug, false);