Re: mm, we use rcu access task_struct in mm_match_cgroup(), but not use rcu free in free_task_struct()

From	Michal Hocko <mhocko@kernel.org>
Newsgroups	linux.kernel
Subject	Re: mm, we use rcu access task_struct in mm_match_cgroup(), but not use rcu free in free_task_struct()
Date	2017-05-24 10:40 +0200
Message-ID	<tKzZN-8mT-43@gated-at.bofh.it> (permalink)
References	<tKtAZ-3u6-3@gated-at.bofh.it> <tKwpc-5MH-23@gated-at.bofh.it> <tKzn3-7OH-11@gated-at.bofh.it> <tKzwK-88W-15@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Wed 24-05-17 16:04:20, Xishi Qiu wrote:
> On 2017/5/24 15:49, Vlastimil Babka wrote:
> 
> > On 05/24/2017 06:40 AM, Xishi Qiu wrote:
> >> On 2017/5/24 9:40, Xishi Qiu wrote:
> >>
> >>> Hi, I find we use rcu access task_struct in mm_match_cgroup(), but not use
> >>> rcu free in free_task_struct(), is it right?
> >>>
> >>> Here is the backtrace.
> > 
> > Can you post the whole oops, including kernel version etc? Is it the
> > same 3.10 RH kernel as in the other report?
> > 
> 
> Hi Vlastimil,
> 
> Yes, it's RHEL 7.2

Please contact Redhat for the support of this kernel. Feel free to
report the issue if it persists with the current vanilla kernel. It is
really hard for us to help you with a custom patched and an old kernel.
-- 
Michal Hocko
SUSE Labs

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mm, we use rcu access task_struct in mm_match_cgroup(), but not use  rcu free in free_task_struct() Xishi Qiu <qiuxishi@huawei.com> - 2017-05-24 03:50 +0200
  Re: mm, we use rcu access task_struct in mm_match_cgroup(), but not  use rcu free in free_task_struct() Xishi Qiu <qiuxishi@huawei.com> - 2017-05-24 06:50 +0200
    Re: mm, we use rcu access task_struct in mm_match_cgroup(), but not  use rcu free in free_task_struct() Vlastimil Babka <vbabka@suse.cz> - 2017-05-24 10:00 +0200
      Re: mm, we use rcu access task_struct in mm_match_cgroup(), but not  use rcu free in free_task_struct() Xishi Qiu <qiuxishi@huawei.com> - 2017-05-24 10:10 +0200
        Re: mm, we use rcu access task_struct in mm_match_cgroup(), but not  use rcu free in free_task_struct() Michal Hocko <mhocko@kernel.org> - 2017-05-24 10:40 +0200

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