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author | Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> | 2012-10-04 11:37:16 +0400 |
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committer | Tejun Heo <tj@kernel.org> | 2012-10-17 04:09:36 +0400 |
commit | 1f5320d5972aa50d3e8d2b227b636b370e608359 (patch) | |
tree | a36f1ef6a2f2f72d81e5aef43c0089bb62056bf5 /kernel/irq | |
parent | ddffeb8c4d0331609ef2581d84de4d763607bd37 (diff) | |
download | linux-1f5320d5972aa50d3e8d2b227b636b370e608359.tar.xz |
cgroup: notify_on_release may not be triggered in some cases
notify_on_release must be triggered when the last process in a cgroup is
move to another. But if the first(and only) process in a cgroup is moved to
another, notify_on_release is not triggered.
# mkdir /cgroup/cpu/SRC
# mkdir /cgroup/cpu/DST
#
# echo 1 >/cgroup/cpu/SRC/notify_on_release
# echo 1 >/cgroup/cpu/DST/notify_on_release
#
# sleep 300 &
[1] 8629
#
# echo 8629 >/cgroup/cpu/SRC/tasks
# echo 8629 >/cgroup/cpu/DST/tasks
-> notify_on_release for /SRC must be triggered at this point,
but it isn't.
This is because put_css_set() is called before setting CGRP_RELEASABLE
in cgroup_task_migrate(), and is a regression introduce by the
commit:74a1166d(cgroups: make procs file writable), which was merged
into v3.0.
Cc: Ben Blum <bblum@andrew.cmu.edu>
Cc: <stable@vger.kernel.org> # v3.0.x and later
Acked-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/irq')
0 files changed, 0 insertions, 0 deletions