linux-kernel - Re: [PATCH 1/7] mm: fix the deadlock in finish

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Message-ID: <9e97cedc-9fd7-4290-9f44-04b96acea15d@bytedance.com>
Date:   Mon, 19 Jul 2021 17:53:12 +0800
From:   Qi Zheng <zhengqi.arch@...edance.com>
To:     "Kirill A. Shutemov" <kirill@...temov.name>
Cc:     akpm@...ux-foundation.org, tglx@...utronix.de, hannes@...xchg.org,
        mhocko@...nel.org, vdavydov.dev@...il.com,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, songmuchun@...edance.com
Subject: Re: [PATCH 1/7] mm: fix the deadlock in finish_fault()



On 7/19/21 5:28 AM, Kirill A. Shutemov wrote:
> On Sun, Jul 18, 2021 at 12:30:27PM +0800, Qi Zheng wrote:
>> The commit 63f3655f9501(mm, memcg: fix reclaim deadlock with writeback)
>> fix a deadlock bug by pre-allocating the pte page table outside of the
>> page lock, the commit f9ce0be71d1f(mm: Cleanup faultaround and
>> finish_fault() codepaths) rework the relevant code but ignore this race,
>> fix it.
>>
>> Fixes: f9ce0be71d1f(mm: Cleanup faultaround and finish_fault() codepaths)
>> Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>
> 
> Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> 
> and add stable@, please.
> 

OK, I will add these in the patch v2, thanks.