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| author | Shaohua Li <shli@fusionio.com> | 2012-08-09 15:20:23 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2012-08-09 15:20:23 +0200 |
| commit | 276f0f5d157bb4a816053f4f3a941dbcd4f76556 (patch) | |
| tree | 96192def39c6cb8dbd6f2ae6b8847aaf20c0dfb4 /include/linux/blkdev.h | |
| parent | 389d7b26d9e4f78b17366c23a3aa16b3c5cb3bde (diff) | |
| download | lwn-276f0f5d157bb4a816053f4f3a941dbcd4f76556.tar.gz lwn-276f0f5d157bb4a816053f4f3a941dbcd4f76556.zip | |
block: disable discard request merge temporarily
The SCSI discard request merge never worked, and looks no solution
for in future, let's disable it temporarily.
Signed-off-by: Shaohua Li <shli@fusionio.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
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, 1 insertions, 1 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index dc632975d54f..4a2ab7c85393 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -601,7 +601,7 @@ static inline void blk_clear_rl_full(struct request_list *rl, bool sync) * it already be started by driver. */ #define RQ_NOMERGE_FLAGS \ - (REQ_NOMERGE | REQ_STARTED | REQ_SOFTBARRIER | REQ_FLUSH | REQ_FUA) + (REQ_NOMERGE | REQ_STARTED | REQ_SOFTBARRIER | REQ_FLUSH | REQ_FUA | REQ_DISCARD) #define rq_mergeable(rq) \ (!((rq)->cmd_flags & RQ_NOMERGE_FLAGS) && \ (((rq)->cmd_flags & REQ_DISCARD) || \ |