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| author | Wanlong Gao <gaowanlong@cn.fujitsu.com> | 2011-09-21 10:22:10 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2011-09-21 10:22:10 +0200 |
| commit | d11bb4462c4cc6ddd45c6927c617ad79fa6fb8fc (patch) | |
| tree | 248949fdd3c8894db0e161e9338a3a984c1ce0f7 /fs/seq_file.c | |
| parent | 8ad6a56f5679a987bfeacad1bd818a2a381aa98e (diff) | |
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>
Diffstat (limited to 'fs/seq_file.c')
0 files changed, 0 insertions, 0 deletions