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Date: Wed, 21 Jul 2021 10:21:47 +0800 From: Qi Zheng <zhengqi.arch@...edance.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: "Kirill A. Shutemov" <kirill@...temov.name>, 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 7/21/21 7:14 AM, Andrew Morton wrote: > On Mon, 19 Jul 2021 17:53:12 +0800 Qi Zheng <zhengqi.arch@...edance.com> wrote: > >> >> >> 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. > > Please send this as a separate standalone patch, not as a part of the > main series. > > Also, please include in the changelog a description of the user-visible > impact of the bug which is being fixed. > OK, I will do this. Thanks, Qi
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