summaryrefslogtreecommitdiff
path: root/mm/page_cgroup.c
diff options
context:
space:
mode:
authorBen Blum <bblum@andrew.cmu.edu>2011-11-03 00:38:07 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-03 03:06:59 +0400
commit77ceab8ea590d7dc6c8f055ce43dfebd74428107 (patch)
treeb2ef5e5baca4579565ab9bf527e965dd9b93a25a /mm/page_cgroup.c
parent33ef6b6984403a688189317ef46bb3caab3b70e0 (diff)
downloadlinux-77ceab8ea590d7dc6c8f055ce43dfebd74428107.tar.xz
cgroups: don't attach task to subsystem if migration failed
If a task has exited to the point it has called cgroup_exit() already, then we can't migrate it to another cgroup anymore. This can happen when we are attaching a task to a new cgroup between the call to ->can_attach_task() on subsystems and the migration that is eventually tried in cgroup_task_migrate(). In this case cgroup_task_migrate() returns -ESRCH and we don't want to attach the task to the subsystems because the attachment to the new cgroup itself failed. Fix this by only calling ->attach_task() on the subsystems if the cgroup migration succeeded. Reported-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Ben Blum <bblum@andrew.cmu.edu> Acked-by: Paul Menage <paul@paulmenage.org> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_cgroup.c')
0 files changed, 0 insertions, 0 deletions