linux-kernel - Re: [PATCH] Cgroup:Fix race between fork and update cpuset mask

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Date:	Fri, 5 Aug 2016 12:49:22 +0200
From:	Greg KH <gregkh@...uxfoundation.org>
To:	chaixianping@...wei.com
Cc:	lizefan@...wei.com, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	Zhenghua Jia <jiazhenghua@...wei.com>,
	Leeyou <leeyou.li@...wei.com>, Lei Liu <liulei@...wei.com>
Subject: Re: [PATCH] Cgroup:Fix race between fork and update cpuset mask

On Thu, Aug 04, 2016 at 07:23:03PM +0800, chaixianping@...wei.com wrote:
> From: chaixianping <chaixianping@...wei.com>
> 
> Fix the race between fork and update_cpumask or update_nodemask.
> Scenario as follows:
> 1)A process fork a child process, the child process have
> inherited the parent process cpus_allowed,mems_allowed
> Before being added cset->tasks list.
> 2)Update_cpumask or update_nodemask change the parent's allowed
> to a new value, *but the child still is the old value.
> after being added cset->tasks list.
> 
> Signed-off-by: Xianping Chai <chaixianping@...wei.com>

This name doesn't match your From: line :(

> Signed-off-by: Zhenghua Jia <jiazhenghua@...wei.com>
> Signed-off-by: Leeyou <leeyou.li@...wei.com>
> Signed-off-by: Lei Liu <liulei@...wei.com>
> ---
>  kernel/cpuset.c | 29 +++++++++++++++++++++++++++++
>  1 file changed, 29 insertions(+)

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read Documentation/stable_kernel_rules.txt
for how to do this properly.

</formletter>