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| author | John Garry <john.garry@huawei.com> | 2022-07-06 20:03:50 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-07-06 06:33:53 -0600 |
| commit | 99e48cd6855e9535488e3c90d65edd46c6e6fc1b (patch) | |
| tree | f8b9316c1622b40713d58def0ea95b940792945e /block/blk-mq.c | |
| parent | deef1be18e3fc62ddf04fb3e5e8ff6a301693dcc (diff) | |
| download | linux-99e48cd6855e9535488e3c90d65edd46c6e6fc1b.tar.bz2 | |
blk-mq: Add a flag for reserved requests
Add a flag for reserved requests so that drivers may know this for any
special handling.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/1657109034-206040-3-git-send-email-john.garry@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 15c7c5c4ad22..a00e43cc67e5 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -475,6 +475,9 @@ retry: if (!(data->rq_flags & RQF_ELV)) blk_mq_tag_busy(data->hctx); + if (data->flags & BLK_MQ_REQ_RESERVED) + data->rq_flags |= RQF_RESV; + /* * Try batched alloc if we want more than 1 tag. */ @@ -589,6 +592,9 @@ struct request *blk_mq_alloc_request_hctx(struct request_queue *q, else data.rq_flags |= RQF_ELV; + if (flags & BLK_MQ_REQ_RESERVED) + data.rq_flags |= RQF_RESV; + ret = -EWOULDBLOCK; tag = blk_mq_get_tag(&data); if (tag == BLK_MQ_NO_TAG) |