Wanlong Gao d11bb4462c blk-cgroup: be able to remove the record of unplugged device ...

The bug is we're not able to remove the device from blkio cgroup's
per-device control files if it gets unplugged.

To reproduce the bug:

  # mount -t cgroup -o blkio xxx /cgroup
  # cd /cgroup
  # echo "8:0 1000" > blkio.throttle.read_bps_device
  # unplug the device
  # cat blkio.throttle.read_bps_device
  8:0	1000
  # echo "8:0 0" > blkio.throttle.read_bps_device
  -bash: echo: write error: No such device

After patching, the device removal will succeed.

Thanks for the comments of Paul, Zefan, and Vivek.

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Paul Menage <paul@paulmenage.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2011-09-21 10:22:10 +02:00

..

blk-cgroup.c

blk-cgroup: be able to remove the record of unplugged device

2011-09-21 10:22:10 +02:00

blk-cgroup.h

cfq-iosched: Make IO merge related stats per cpu

2011-05-23 10:02:19 +02:00

blk-core.c

block: simplify force plug flush code a little bit

2011-08-24 16:04:34 +02:00

blk-exec.c

[SCSI] fix crash in scsi_dispatch_cmd()

2011-07-21 14:21:18 -07:00

blk-flush.c

block: fix flush machinery for stacking drivers with differring flush flags

2011-08-15 21:37:25 +02:00

blk-integrity.c

dm: improve block integrity support

2011-04-05 23:52:43 +02:00

blk-ioc.c

Merge branch 'for-linus' into for-3.1/core

2011-07-01 16:17:13 +02:00

blk-iopoll.c

tree-wide: fix assorted typos all over the place

2009-12-04 15:39:55 +01:00

blk-lib.c

block: fix patch import error in max_discard_sectors check

2011-07-23 20:34:59 +02:00

blk-map.c

block: check for proper length of iov entries earlier in blk_rq_map_user_iov()

2010-11-29 10:04:50 +01:00

blk-merge.c

block: attempt to merge with existing requests on plug flush

2011-03-21 10:14:27 +01:00

blk-settings.c

block: Fix discard topology stacking and reporting

2011-05-18 10:37:35 +02:00

blk-softirq.c

block: Don't check QUEUE_FLAG_SAME_COMP in __blk_complete_request

2011-09-14 09:31:01 +02:00

blk-sysfs.c

block: Fix queue_flag update when rq_affinity goes from 2 to 1

2011-08-24 08:51:34 +02:00

blk-tag.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

blk-throttle.c

blk-throttle: correctly determine sync bio

2011-08-01 10:31:06 +02:00

blk-timeout.c

fault-injection: add ability to export fault_attr in arbitrary directory

2011-08-03 14:25:20 -10:00

blk.h

block: fix flush machinery for stacking drivers with differring flush flags

2011-08-15 21:37:25 +02:00

bsg-lib.c

bsg-lib: add module.h include

2011-08-02 10:43:35 +02:00

bsg.c

bsg: fix address space warning from sparse

2011-06-20 13:27:45 +02:00

cfq-iosched.c

block: separate priority boosting from REQ_META

2011-08-23 14:50:29 +02:00

cfq.h

blk-cgroup: Add unaccounted time to timeslice_used.

2011-03-12 16:54:00 +01:00

compat_ioctl.c

compat_ioctl: fix warning caused by qemu

2011-07-01 22:32:26 +02:00

deadline-iosched.c

iosched: prevent aliased requests from starving other I/O

2011-06-02 21:19:05 +02:00

elevator.c

iosched: prevent aliased requests from starving other I/O

2011-06-02 21:19:05 +02:00

genhd.c

block/genhd.c: remove useless cast in diskstats_show()

2011-08-02 12:43:50 +02:00

ioctl.c

block: fix refcounting in BLKBSZSET

2011-02-24 08:54:21 -08:00

Kconfig

block: add bsg helper library

2011-07-31 22:05:09 +02:00

Kconfig.iosched

blk-cgroup: config options re-arrangement

2010-04-26 19:27:56 +02:00

Makefile

block: add bsg helper library

2011-07-31 22:05:09 +02:00

noop-iosched.c

block: remove per-queue plugging

2011-03-10 08:52:07 +01:00

scsi_ioctl.c

block: take care not to overflow when calculating total iov length

2010-11-10 14:40:42 +01:00