linux-kernel - Re: cpusets in non-unified hierarchy broken?

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Message-ID: <54DD5E80.4090402@huawei.com>
Date:	Fri, 13 Feb 2015 10:16:32 +0800
From:	Zefan Li <lizefan@...wei.com>
To:	Serge Hallyn <serge.hallyn@...ntu.com>
CC:	<linux-kernel@...r.kernel.org>, <tj@...nel.org>,
	Stéphane Graber 
	<stgraber@...ntu.com>, <christianvanbrauner@...il.com>
Subject: Re: cpusets in non-unified hierarchy broken?

On 2015/2/13 5:49, Serge Hallyn wrote:
> Hi,
> 
> as of some point in 3.18, cpuset.cpus doesn't seem to be
> enforced any more.  I don't see an obvious reason in the
> code, but it seems likely to be related to the effective_cpus.
> 
> If I mount -t cgroup -o cpuset cpuset /mnt and then mkdir /mnt/lxc,
> then /mnt/lxc has:
> 
> ====================================================
> ubuntu@...set1:~$ cat /mnt/lxc/cpuset.effective_cpus
> 
> ubuntu@...set1:~$ cat /mnt/lxc/cpuset.cpus
> 0-3

This happens when you enable cgroup.clone_children.

Thanks for reporting this bug! Will fix it soon.

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