linux-kernel - Re: [PATCH] cgroup/cpuset: Fix a race between cpuset

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Message-ID: <eab13a50-463d-3d45-d58a-77dfebd3b4dd@huawei.com>
Date:   Sat, 22 Jan 2022 15:37:32 +0800
From:   Zhang Qiao <zhangqiao22@...wei.com>
To:     Michal Koutný <mkoutny@...e.com>
CC:     <linux-kernel@...r.kernel.org>, <cgroups@...r.kernel.org>,
        <tj@...nel.org>, <lizefan.x@...edance.com>, <hannes@...xchg.org>,
        <matthltc@...ibm.com>, <bblum@...gle.com>, <menage@...gle.com>,
        <akpm@...ux-foundation.org>, <longman@...hat.com>,
        <zhaogongyi@...wei.com>
Subject: Re: [PATCH] cgroup/cpuset: Fix a race between cpuset_attach() and cpu
 hotplug



在 2022/1/21 23:57, Michal Koutný 写道:
> On Fri, Jan 21, 2022 at 06:12:10PM +0800, Zhang Qiao <zhangqiao22@...wei.com> wrote:
>> Fixes: be367d099270 ("cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time")
> 
> What a deep stratigraphy (not sure if it's this one but anything else
> would likely come from eras ago too).

Yes, I checked again and this bug may have existed since the tag Linux-2.6.12-rc2.
>> Reported-by: Zhao Gongyi <zhaogongyi@...wei.com>
>> Signed-off-by: Zhang Qiao <zhangqiao22@...wei.com>
>> ---
>>  kernel/cgroup/cpuset.c | 2 ++
>>  1 file changed, 2 insertions(+)
> 
> Feel free to include
> Reviewed-by: Michal Koutný <mkoutny@...e.com>
> 
Thanks for your review!

Regards,
Qiao
.

> .
>