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kernel-ark/block
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David Woodhouse e17fc0a1cc Allow elevators to sort/merge discard requests 
But blkdev_issue_discard() still emits requests which are interpreted as
soft barriers, because naïve callers might otherwise issue subsequent
writes to those same sectors, which might cross on the queue (if they're
reallocated quickly enough).

Callers still _can_ issue non-barrier discard requests, but they have to
take care of queue ordering for themselves.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09 08:56:02 +02:00
..
as-iosched.c Use WARN() in block/ 2008-07-26 12:00:07 -07:00
blk-barrier.c Allow elevators to sort/merge discard requests 2008-10-09 08:56:02 +02:00
blk-core.c Allow elevators to sort/merge discard requests 2008-10-09 08:56:02 +02:00
blk-exec.c block: unexport blk_end_sync_rq 2008-07-15 21:21:45 +02:00
blk-integrity.c block: integrity flags can't use bit ops on unsigned short 2008-07-03 13:21:15 +02:00
blk-ioc.c cfq-iosched: fix RCU race in the cfq io_context destructor handling 2008-05-07 09:28:57 +02:00
blk-map.c block/blk-map.c: use the new object_is_on_stack() helper 2008-07-26 12:00:02 -07:00
blk-merge.c Allow elevators to sort/merge discard requests 2008-10-09 08:56:02 +02:00
blk-settings.c Add 'discard' request handling 2008-10-09 08:56:01 +02:00
blk-sysfs.c block: sysfs store function needs to grab queue_lock and use queue_flag_*() 2008-05-07 09:09:39 +02:00
blk-tag.c block: remove unused ->busy part of the block queue tag map 2008-08-27 09:50:19 +02:00
blk.h block: Block layer data integrity support 2008-07-03 13:21:13 +02:00
blktrace.c blktrace: simplify flags handling in __blk_add_trace 2008-10-09 08:56:01 +02:00
bsg.c block: move cmdfilter from gendisk to request_queue 2008-08-27 09:50:19 +02:00
cfq-iosched.c cfq-iosched: get rid of enable_idle being unused warning 2008-07-03 13:21:14 +02:00
cmd-filter.c block: disable sysfs parts of the disk command filter 2008-09-11 14:20:23 +02:00
compat_ioctl.c Add BLKDISCARD ioctl to allow userspace to discard sectors 2008-10-09 08:56:02 +02:00
deadline-iosched.c block: let elv_register() return void 2007-12-18 08:29:28 +01:00
elevator.c Allow elevators to sort/merge discard requests 2008-10-09 08:56:02 +02:00
genhd.c block: restore original behavior of /proc/partition when there's no partition 2008-09-01 08:55:10 +02:00
ioctl.c Allow elevators to sort/merge discard requests 2008-10-09 08:56:02 +02:00
Kconfig block: Block layer data integrity support 2008-07-03 13:21:13 +02:00
Kconfig.iosched update I/O sched Kconfig help texts - CFQ is now default, not AS. 2007-02-17 20:08:22 +01:00
Makefile allow userspace to modify scsi command filter on per device basis 2008-07-03 13:21:14 +02:00
noop-iosched.c block: let elv_register() return void 2007-12-18 08:29:28 +01:00
scsi_ioctl.c SG_IO block filter whitelist missing MMC SET READ AHEAD command 2008-10-09 08:56:00 +02:00