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Re: [PATCH for-4.6] cgroup: ignore css_sets associated with dead cgroups during migration

From Tejun Heo <tj@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH for-4.6] cgroup: ignore css_sets associated with dead cgroups during migration
Date 2016-03-16 21:30 +0100
Message-ID <rdqeT-5tf-41@gated-at.bofh.it> (permalink)
References <rd7OV-1kw-1@gated-at.bofh.it> <rdhbz-7Mo-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Wed, Mar 16, 2016 at 11:45:27AM +0100, Peter Zijlstra wrote:
> This doesn't fix the problem that those zombies might actually still
> want to use the cgroups they're tied to, as reported here:
> 
>   lkml.kernel.org/r/20160314112057.GT6356@twins.programming.kicks-ass.net
> 
> I would strongly suggest to revert 2e91fa7f6d45 wholesale (and mark for
> stable) and try again later.

For the record, this issue was caused by the cpu controller taking
down its css too early during destruction at ->css_offline() and is
fixed by switching to ->css_released() instead.

Thanks.

-- 
tejun

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Thread

[PATCH for-4.6] cgroup: ignore css_sets associated with dead cgroups  during migration Tejun Heo <tj@kernel.org> - 2016-03-16 01:50 +0100
  Re: [PATCH for-4.6] cgroup: ignore css_sets associated with dead  cgroups during migration Peter Zijlstra <peterz@infradead.org> - 2016-03-16 11:50 +0100
    Re: [PATCH for-4.6] cgroup: ignore css_sets associated with dead  cgroups during migration Tejun Heo <tj@kernel.org> - 2016-03-16 21:30 +0100
  Re: [PATCH for-4.6] cgroup: ignore css_sets associated with dead  cgroups during migration Tejun Heo <tj@kernel.org> - 2016-03-16 21:40 +0100

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