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| author | Tejun Heo <tj@kernel.org> | 2018-01-09 08:29:51 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-01-09 09:31:15 -0700 |
| commit | 634f9e4631a88025d3b90c1884e9a1b6a13d01d2 (patch) | |
| tree | 181882ff0dc0d5b0844ede83e2cfc954e28df69f /include/linux/blkdev.h | |
| parent | 358f70da49d77c43f2ca11b5da584213b2add29c (diff) | |
| download | linux-stable-634f9e4631a88025d3b90c1884e9a1b6a13d01d2.tar.gz linux-stable-634f9e4631a88025d3b90c1884e9a1b6a13d01d2.tar.bz2 linux-stable-634f9e4631a88025d3b90c1884e9a1b6a13d01d2.zip | |
blk-mq: remove REQ_ATOM_COMPLETE usages from blk-mq
After the recent updates to use generation number and state based
synchronization, blk-mq no longer depends on REQ_ATOM_COMPLETE except
to avoid firing the same timeout multiple times.
Remove all REQ_ATOM_COMPLETE usages and use a new rq_flags flag
RQF_MQ_TIMEOUT_EXPIRED to avoid firing the same timeout multiple
times. This removes atomic bitops from hot paths too.
v2: Removed blk_clear_rq_complete() from blk_mq_rq_timed_out().
v3: Added RQF_MQ_TIMEOUT_EXPIRED flag.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: "jianchao.wang" <jianchao.w.wang@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index ae563d01b29d..007a7cf1f262 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -125,6 +125,8 @@ typedef __u32 __bitwise req_flags_t; #define RQF_SPECIAL_PAYLOAD ((__force req_flags_t)(1 << 18)) /* The per-zone write lock is held for this request */ #define RQF_ZONE_WRITE_LOCKED ((__force req_flags_t)(1 << 19)) +/* timeout is expired */ +#define RQF_MQ_TIMEOUT_EXPIRED ((__force req_flags_t)(1 << 20)) /* flags that prevent us from merging requests: */ #define RQF_NOMERGE_FLAGS \ |