diff options
| author | Ming Lei <ming.lei@redhat.com> | 2021-10-26 16:22:57 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-10-26 08:38:11 -0600 |
| commit | ff1552232b3612edff43a95746a4e78e231ef3d4 (patch) | |
| tree | 471881aa06bfa9a9fe5efb9f061b8de642ebc852 /block/blk-mq.c | |
| parent | 9f8b93a7df4d8e1e8715fb2a45a893cffad9da0b (diff) | |
| download | lwn-ff1552232b3612edff43a95746a4e78e231ef3d4.tar.gz lwn-ff1552232b3612edff43a95746a4e78e231ef3d4.zip | |
blk-mq: don't issue request directly in case that current is to be blocked
When flushing plug list in case that current will be blocked, we can't
issue request directly because ->queue_rq() may sleep, otherwise scheduler
may complain.
Fixes: dc5fc361d891 ("block: attempt direct issue of plug list")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20211026082257.2889890-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index c19dfa8ea65e..9840b15f505b 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2223,7 +2223,7 @@ void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule) return; plug->rq_count = 0; - if (!plug->multiple_queues && !plug->has_elevator) { + if (!plug->multiple_queues && !plug->has_elevator && !from_schedule) { blk_mq_plug_issue_direct(plug, from_schedule); if (rq_list_empty(plug->mq_list)) return; |