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| author | Wanlong Gao <gaowanlong@cn.fujitsu.com> | 2011-09-21 04:22:10 -0400 |
|---|---|---|
| committer | Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> | 2011-10-17 13:33:00 -0400 |
| commit | 54c2f01b75b73f13e9af149ae5c896f68d2c49b5 (patch) | |
| tree | 558bcb1654a326fbb1727b90f52eb13704d51888 /drivers/scsi/iscsi_tcp.c | |
| parent | 59f53ce22e0166ac046b63f73193f233b1d3a1b0 (diff) | |
blk-cgroup: be able to remove the record of unplugged device
BugLink: http://bugs.launchpad.net/bugs/868628
commit d11bb4462c4cc6ddd45c6927c617ad79fa6fb8fc upstream.
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/scsi/iscsi_tcp.c')
0 files changed, 0 insertions, 0 deletions