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e7e2450001
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Jens Axboe e7e2450001 blk-mq: don't disallow request merges for req->special being set 
For blk-mq, if a driver has requested per-request payload data
to carry command structures, they are stuffed into req->special.
For an old style request based driver, req->special is used
for the same purpose but indicates that a per-driver request
structure has been prepared for the request already. So for the
old style driver, we do not merge such requests.

As most/all blk-mq drivers will use the payload feature, and
since we have no problem merging on these, make this check
dependent on whether it's a blk-mq enabled driver or not.

Reported-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-10-29 12:11:47 -06:00
..
partitions block: change config option name for cmdline partition parsing 2013-09-30 14:31:02 -07:00
blk-cgroup.c Merge branch 'for-3.12/core' of git://git.kernel.dk/linux-block 2013-09-22 15:00:11 -07:00
blk-cgroup.h cgroup: make css_for_each_descendant() and friends include the origin css in the iteration 2013-08-08 20:11:27 -04:00
blk-core.c blk-mq: mq plug list breakage 2013-10-29 12:01:03 -06:00
blk-exec.c blk-mq: new multi-queue block IO queueing mechanism 2013-10-25 11:56:00 +01:00
blk-flush.c blk-mq: fix for flush deadlock 2013-10-28 13:33:58 -06:00
blk-integrity.c scatterlist: introduce sg_unmark_end 2013-03-20 15:43:04 +10:30
blk-ioc.c lib/radix-tree.c: make radix_tree_node_alloc() work correctly within interrupt 2013-09-11 15:59:36 -07:00
blk-iopoll.c block: delete __cpuinit usage from all block files 2013-07-14 19:36:59 -04:00
blk-lib.c block: account iowait time when waiting for completion of IO request 2013-02-15 16:45:07 +01:00
blk-map.c block: re-use existing 'reading' variable instead of checking direction again 2011-12-21 15:27:24 +01:00
blk-merge.c blk-mq: don't disallow request merges for req->special being set 2013-10-29 12:11:47 -06:00
blk-mq-cpu.c blk-mq: new multi-queue block IO queueing mechanism 2013-10-25 11:56:00 +01:00
blk-mq-cpumap.c blk-mq: new multi-queue block IO queueing mechanism 2013-10-25 11:56:00 +01:00
blk-mq-sysfs.c blk-mq: new multi-queue block IO queueing mechanism 2013-10-25 11:56:00 +01:00
blk-mq-tag.c blk-mq: new multi-queue block IO queueing mechanism 2013-10-25 11:56:00 +01:00
blk-mq-tag.h blk-mq: new multi-queue block IO queueing mechanism 2013-10-25 11:56:00 +01:00
blk-mq.c blk-mq: mq plug list breakage 2013-10-29 12:01:03 -06:00
blk-mq.h blk-mq: new multi-queue block IO queueing mechanism 2013-10-25 11:56:00 +01:00
blk-settings.c block: discard granularity might not be power of 2 2012-12-14 20:46:04 +01:00
blk-softirq.c block: delete __cpuinit usage from all block files 2013-07-14 19:36:59 -04:00
blk-sysfs.c blk-mq: new multi-queue block IO queueing mechanism 2013-10-25 11:56:00 +01:00
blk-tag.c block: Reserve only one queue tag for sync IO if only 3 tags are available 2013-06-28 21:32:27 +02:00
blk-throttle.c cgroup: make css_for_each_descendant() and friends include the origin css in the iteration 2013-08-08 20:11:27 -04:00
blk-timeout.c blk-mq: new multi-queue block IO queueing mechanism 2013-10-25 11:56:00 +01:00
blk.h blk-mq: new multi-queue block IO queueing mechanism 2013-10-25 11:56:00 +01:00
bsg-lib.c bsg: Remove unused function bsg_goose_queue() 2012-12-06 14:33:02 +01:00
bsg.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
cfq-iosched.c Merge branch 'for-3.12/core' of git://git.kernel.dk/linux-block 2013-09-22 15:00:11 -07:00
cmdline-parser.c block: support embedded device command line partition 2013-09-11 15:56:57 -07:00
compat_ioctl.c kernel-wide: fix missing validations on __get/__put/__copy_to/__copy_from_user() 2013-09-11 15:58:18 -07:00
deadline-iosched.c block: Convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...) 2013-09-11 13:22:03 -06:00
elevator.c block: Convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...) 2013-09-11 13:22:03 -06:00
genhd.c block: Convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...) 2013-09-11 13:22:03 -06:00
ioctl.c Merge branch 'for-3.7/core' of git://git.kernel.dk/linux-block 2012-10-11 09:04:23 +09:00
Kconfig block: change config option name for cmdline partition parsing 2013-09-30 14:31:02 -07:00
Kconfig.iosched blkcg: make CONFIG_BLK_CGROUP bool 2012-03-06 21:27:21 +01:00
Makefile blk-mq: new multi-queue block IO queueing mechanism 2013-10-25 11:56:00 +01:00
noop-iosched.c elevator: Fix a race in elevator switching 2013-07-03 13:25:24 +02:00
partition-generic.c Revert "loop: cleanup partitions when detaching loop device" 2013-04-08 10:12:11 +02:00
scsi_ioctl.c aio: don't include aio.h in sched.h 2013-05-07 20:16:25 -07:00