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Re: [PATCH?] race between cgroup_subsys->fork() and cgroup_migrate()

From Oleg Nesterov <oleg@redhat.com>
Newsgroups linux.kernel
Subject Re: [PATCH?] race between cgroup_subsys->fork() and cgroup_migrate()
Date 2015-11-26 17:10 +0100
Message-ID <qz7ho-7tT-15@gated-at.bofh.it> (permalink)
References <qyLgR-jU-1@gated-at.bofh.it> <qyOoq-2en-11@gated-at.bofh.it> <qyOoq-2en-15@gated-at.bofh.it> <qyPaO-2MO-13@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 11/25, Tejun Heo wrote:
>
> And I spotted a bug in cgroup core in controller enable path.  While
> the race between fork and attach exists and needs to be fixed, I think
> the cgroup core bug is the main source of discrepancy.  Will update
> once I learn more.

OK. I do not know what exactly do you mean, perhaps if you fix this problem
the race between fork and attach goes away and in this case the fix I sent
is not needed? I'll wait for more info.

Oleg.

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Thread

[PATCH?] race between cgroup_subsys->fork() and cgroup_migrate() Oleg Nesterov <oleg@redhat.com> - 2015-11-25 17:40 +0100
  Re: [PATCH?] race between cgroup_subsys->fork() and cgroup_migrate() Tejun Heo <tj@kernel.org> - 2015-11-25 21:00 +0100
    Re: [PATCH?] race between cgroup_subsys->fork() and cgroup_migrate() Tejun Heo <tj@kernel.org> - 2015-11-25 21:00 +0100
      Re: [PATCH?] race between cgroup_subsys->fork() and cgroup_migrate() Tejun Heo <tj@kernel.org> - 2015-11-25 21:50 +0100
        Re: [PATCH?] race between cgroup_subsys->fork() and  cgroup_migrate() Oleg Nesterov <oleg@redhat.com> - 2015-11-26 17:10 +0100
      Re: [PATCH?] race between cgroup_subsys->fork() and  cgroup_migrate() Oleg Nesterov <oleg@redhat.com> - 2015-11-26 16:40 +0100
        Re: [PATCH?] race between cgroup_subsys->fork() and cgroup_migrate() Aleksa Sarai <cyphar@cyphar.com> - 2015-11-27 00:40 +0100

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