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blk-mq: make sure elevator callbacks aren't called for passthrough request

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In case of q->elevator, passthrough request can still be marked as
RQF_ELV, so some elevator callbacks will be called for them.

Fix this by splitting RQF_SCHED_TAGS, which is set for all requests that
are issued on a queue that uses an I/O scheduler, and RQF_USE_SCHED for
non-flush, non-passthrough requests on such a queue.

Roughly based on two different patches from
Ming Lei <ming.lei@redhat.com>.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230518053101.760632-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2023-05-18 07:31:01 +02:00
committed by Jens Axboe
parent fdcab6cdde
commit dd6216bb16
5 changed files with 44 additions and 36 deletions
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3
block/blk-mq-debugfs.c
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@@ -249,6 +249,8 @@ static const char *const rqf_name[] = {
RQF_NAME(MIXED_MERGE),
RQF_NAME(MQ_INFLIGHT),
RQF_NAME(DONTPREP),
RQF_NAME(SCHED_TAGS),
RQF_NAME(USE_SCHED),
RQF_NAME(FAILED),
RQF_NAME(QUIET),
RQF_NAME(IO_STAT),
@@ -258,7 +260,6 @@ static const char *const rqf_name[] = {
RQF_NAME(SPECIAL_PAYLOAD),
RQF_NAME(ZONE_WRITE_LOCKED),
RQF_NAME(TIMED_OUT),
RQF_NAME(ELV),
RQF_NAME(RESV),
};
#undef RQF_NAME