diff options
| author | Christoph Hellwig <hch@lst.de> | 2023-05-19 06:40:48 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-05-20 03:52:29 +0200 |
| commit | 615939a2ae734e3e68c816d6749d1f5f79c62ab7 (patch) | |
| tree | 9071830638e153f97f940d75d45c7d85862bf14e /block | |
| parent | blk-mq: use the I/O scheduler for writes from the flush state machine (diff) | |
| download | linux-615939a2ae734e3e68c816d6749d1f5f79c62ab7.tar.xz linux-615939a2ae734e3e68c816d6749d1f5f79c62ab7.zip | |
blk-mq: defer to the normal submission path for post-flush requests
Requests with the FUA bit on hardware without FUA support need a post
flush before returning to the caller, but they can still be sent using
the normal I/O path after initializing the flush-related fields and
end I/O handler.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230519044050.107790-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-flush.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/block/blk-flush.c b/block/blk-flush.c index 6fb9cf2d3818..7121f9ad0762 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -432,6 +432,17 @@ bool blk_insert_flush(struct request *rq) * Queue for normal execution. */ return false; + case REQ_FSEQ_DATA | REQ_FSEQ_POSTFLUSH: + /* + * Initialize the flush fields and completion handler to trigger + * the post flush, and then just pass the command on. + */ + blk_rq_init_flush(rq); + rq->flush.seq |= REQ_FSEQ_POSTFLUSH; + spin_lock_irq(&fq->mq_flush_lock); + list_move_tail(&rq->flush.list, &fq->flush_data_in_flight); + spin_unlock_irq(&fq->mq_flush_lock); + return false; default: /* * Mark the request as part of a flush sequence and submit it |