Hello, again.
On Thu, Oct 18, 2012 at 05:38:35PM -0700, Tejun Heo wrote:
> Even if there isn't an actual race, the comment is dead wrong. I'm
> reverting the following three patches. Let's try again later.
>
> 7e381b0eb1 ("cgroup: Drop task_lock(parent) on cgroup_fork()")
> 7e3aa30ac8 ("cgroup: Remove task_lock() from cgroup_post_fork()")
So, after some more looking, I think the following is correct and
doesn't need to be reverted. It's depending on threadgroup locking
from migration path to synchronize against exit path which is always
performed.
> c84cdf75cc ("cgroup: Remove unnecessary task_lock before fetching css_set on migration")
Frederic, were you trying to say that the above commit is correct?
Li, do you agree?
Thanks.
--
tejun
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