diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-01 09:00:29 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-01 09:00:29 -0800 |
| commit | b1bf9368407ae7e89d8a005bb40beb70a41df539 (patch) | |
| tree | 3815c8aab19c6c186736673c624fef5f3faab716 /block/elevator.c | |
| parent | 524df55725217b13d5a232fb5badb5846418ea0e (diff) | |
| parent | 4671a1322052425afa38fcb7980d2fd2bb0fc99b (diff) | |
Merge branch 'for-2.6.34' of git://git.kernel.dk/linux-2.6-block
* 'for-2.6.34' of git://git.kernel.dk/linux-2.6-block: (38 commits)
block: don't access jiffies when initialising io_context
cfq: remove 8 bytes of padding from cfq_rb_root on 64 bit builds
block: fix for "Consolidate phys_segment and hw_segment limits"
cfq-iosched: quantum check tweak
blktrace: perform cleanup after setup error
blkdev: fix merge_bvec_fn return value checks
cfq-iosched: requests "in flight" vs "in driver" clarification
cciss: Fix problem with scatter gather elements in the scsi half of the driver
cciss: eliminate unnecessary pointer use in cciss scsi code
cciss: do not use void pointer for scsi hba data
cciss: factor out scatter gather chain block mapping code
cciss: fix scatter gather chain block dma direction kludge
cciss: simplify scatter gather code
cciss: factor out scatter gather chain block allocation and freeing
cciss: detect bad alignment of scsi commands at build time
cciss: clarify command list padding calculation
cfq-iosched: rethink seeky detection for SSDs
cfq-iosched: rework seeky detection
block: remove padding from io_context on 64bit builds
block: Consolidate phys_segment and hw_segment limits
...
Diffstat (limited to 'block/elevator.c')
| -rw-r--r-- | block/elevator.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/block/elevator.c b/block/elevator.c index 9ad5ccc4c5e..ee3a883840f 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -474,6 +474,15 @@ int elv_merge(struct request_queue *q, struct request **req, struct bio *bio) int ret; /* + * Levels of merges: + * nomerges: No merges at all attempted + * noxmerges: Only simple one-hit cache try + * merges: All merge tries attempted + */ + if (blk_queue_nomerges(q)) + return ELEVATOR_NO_MERGE; + + /* * First try one-hit cache. */ if (q->last_merge) { @@ -484,7 +493,7 @@ int elv_merge(struct request_queue *q, struct request **req, struct bio *bio) } } - if (blk_queue_nomerges(q)) + if (blk_queue_noxmerges(q)) return ELEVATOR_NO_MERGE; /* |