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From:   Shakeel Butt <shakeelb@google.com>
Date:   Tue, 5 Jan 2021 11:42:18 -0800
Message-ID: <CALvZod448Ebw7YE-HVCNXNSbtvTcTvQx+_EqcyxTVd_SZ4ATBA@mail.gmail.com>
Subject: Re: [PATCH v21 00/19] per memcg lru lock
To:     Qian Cai <qcai@redhat.com>
Cc:     Alex Shi <alex.shi@linux.alibaba.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Mel Gorman <mgorman@techsingularity.net>,
        Tejun Heo <tj@kernel.org>, Hugh Dickins <hughd@google.com>,
        Konstantin Khlebnikov <khlebnikov@yandex-team.ru>,
        Daniel Jordan <daniel.m.jordan@oracle.com>,
        Matthew Wilcox <willy@infradead.org>,
        Johannes Weiner <hannes@cmpxchg.org>,
        kernel test robot <lkp@intel.com>,
        Linux MM <linux-mm@kvack.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Cgroups <cgroups@vger.kernel.org>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
        Wei Yang <richard.weiyang@gmail.com>,
        "Kirill A. Shutemov" <kirill@shutemov.name>,
        alexander.duyck@gmail.com,
        kernel test robot <rong.a.chen@intel.com>,
        Michal Hocko <mhocko@suse.com>,
        Vladimir Davydov <vdavydov.dev@gmail.com>,
        Yang Shi <shy828301@gmail.com>
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On Tue, Jan 5, 2021 at 11:30 AM Qian Cai <qcai@redhat.com> wrote:
>
> On Thu, 2020-11-05 at 16:55 +0800, Alex Shi wrote:
> > This version rebase on next/master 20201104, with much of Johannes's
> > Acks and some changes according to Johannes comments. And add a new patch
> > v21-0006-mm-rmap-stop-store-reordering-issue-on-page-mapp.patch to support
> > v21-0007.
> >
> > This patchset followed 2 memcg VM_WARN_ON_ONCE_PAGE patches which were
> > added to -mm tree yesterday.
> >
> > Many thanks for line by line review by Hugh Dickins, Alexander Duyck and
> > Johannes Weiner.
>
> Given the troublesome history of this patchset, and had been put into linux-next
> recently, as well as it touched both THP and mlock. Is it a good idea to suspect
> this patchset introducing some races and a spontaneous crash with some mlock
> memory presume?

This has already been merged into the linus tree. Were you able to get
a similar crash on the latest upstream kernel as well?