linux-kernel - Re: [PATCH] mm: memcg: Fix memcg reclaim soft lockup

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Message-ID: <cbf64fdf-65a5-bda3-7a60-9b3ca70a16c9@linux.alibaba.com>
Date:   Wed, 26 Aug 2020 21:48:06 +0800
From:   xunlei <xlpang@...ux.alibaba.com>
To:     Michal Hocko <mhocko@...e.com>
Cc:     Johannes Weiner <hannes@...xchg.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] mm: memcg: Fix memcg reclaim soft lockup

On 2020/8/26 下午9:26, Michal Hocko wrote:
> On Wed 26-08-20 21:16:28, xunlei wrote:
> [...]
>> oom_reaper also can't get scheduled because of 1-cpu, and the mutex
>> uses might_sleep() which is noop in case of "CONFIG_PREEMPT_VOLUNTARY is
>> not set" I mentioned in the commit log.
> 
> OK, I see. I have clearly missed the 1cpu configuration. Sorry about
> that.
> 
> Thanks for bearing with me.
> 

Thanks for the confirmation, has sent v2.