From: Michal Hocko <mhocko@kernel.org>
To: Naresh Kamboju <naresh.kamboju@linaro.org>,
Chris Down <chris@chrisdown.name>
Cc: lkft-triage@lists.linaro.org, linux-mm <linux-mm@kvack.org>,
Yafang Shao <laoar.shao@gmail.com>,
Andreas Dilger <adilger.kernel@dilger.ca>,
Jaegeuk Kim <jaegeuk@kernel.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Anders Roxell <anders.roxell@linaro.org>,
Hugh Dickins <hughd@google.com>,
Matthew Wilcox <willy@infradead.org>,
Linux-Next Mailing List <linux-next@vger.kernel.org>,
linux-ext4 <linux-ext4@vger.kernel.org>,
Arnd Bergmann <arnd@arndb.de>,
linux-block <linux-block@vger.kernel.org>,
cgroups@vger.kernel.org, Theodore Ts'o <tytso@mit.edu>,
open list <linux-kernel@vger.kernel.org>,
"Linux F2FS DEV,
Mailing List" <linux-f2fs-devel@lists.sourceforge.net>,
Johannes Weiner <hannes@cmpxchg.org>,
Andrew Morton <akpm@linux-foundation.org>,
Roman Gushchin <guro@fb.com>
Subject: Re: [f2fs-dev] mm: mkfs.ext4 invoked oom-killer on i386 - pagecache_get_page
Date: Thu, 21 May 2020 11:55:15 +0200 [thread overview]
Message-ID: <20200521095515.GK6462@dhcp22.suse.cz> (raw)
In-Reply-To: <20200520190906.GA558281@chrisdown.name>
On Wed 20-05-20 20:09:06, Chris Down wrote:
> Hi Naresh,
>
> Naresh Kamboju writes:
> > As a part of investigation on this issue LKFT teammate Anders Roxell
> > git bisected the problem and found bad commit(s) which caused this problem.
> >
> > The following two patches have been reverted on next-20200519 and retested the
> > reproducible steps and confirmed the test case mkfs -t ext4 got PASS.
> > ( invoked oom-killer is gone now)
> >
> > Revert "mm, memcg: avoid stale protection values when cgroup is above
> > protection"
> > This reverts commit 23a53e1c02006120f89383270d46cbd040a70bc6.
> >
> > Revert "mm, memcg: decouple e{low,min} state mutations from protection
> > checks"
> > This reverts commit 7b88906ab7399b58bb088c28befe50bcce076d82.
>
> Thanks Anders and Naresh for tracking this down and reverting.
>
> I'll take a look tomorrow. I don't see anything immediately obviously wrong
> in either of those commits from a (very) cursory glance, but they should
> only be taking effect if protections are set.
Agreed. If memory.{low,min} is not used then the patch should be
effectively a nop. Btw. do you see the problem when booting with
cgroup_disable=memory kernel command line parameter?
I suspect that something might be initialized for memcg incorrectly and
the patch just makes it more visible for some reason.
--
Michal Hocko
SUSE Labs
_______________________________________________
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next prev parent reply other threads:[~2020-05-21 9:55 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-01 12:38 [f2fs-dev] mm: mkfs.ext4 invoked oom-killer on i386 - pagecache_get_page Naresh Kamboju
2020-05-01 20:58 ` Andrew Morton
2020-05-18 14:10 ` Naresh Kamboju
2020-05-19 7:52 ` Michal Hocko
2020-05-19 8:11 ` Arnd Bergmann
2020-05-19 8:45 ` Michal Hocko
2020-05-20 11:56 ` Naresh Kamboju
2020-05-20 17:59 ` Naresh Kamboju
2020-05-20 19:09 ` Chris Down
2020-05-21 9:22 ` Naresh Kamboju
2020-05-21 9:35 ` Arnd Bergmann
2020-05-21 9:55 ` Michal Hocko [this message]
2020-05-21 10:41 ` Naresh Kamboju
2020-05-21 10:58 ` Michal Hocko
2020-05-21 12:24 ` Hugh Dickins via Linux-f2fs-devel
2020-05-21 12:44 ` Michal Hocko
2020-05-21 19:17 ` Johannes Weiner
2020-05-21 20:06 ` Hugh Dickins via Linux-f2fs-devel
2020-05-21 21:58 ` Johannes Weiner
2020-05-21 23:35 ` Hugh Dickins via Linux-f2fs-devel
2020-05-28 14:59 ` Michal Hocko
2020-05-21 16:34 ` Michal Hocko
2020-05-21 19:00 ` Naresh Kamboju
2020-05-21 20:53 ` Naresh Kamboju
2020-05-28 15:03 ` Michal Hocko
2020-05-28 16:17 ` Naresh Kamboju
2020-05-28 16:41 ` Chris Down
2020-05-29 1:50 ` Yafang Shao
2020-05-29 1:56 ` Chris Down
2020-05-29 9:49 ` Michal Hocko
2020-06-11 9:55 ` Michal Hocko
2020-06-12 9:43 ` Naresh Kamboju
2020-06-12 12:09 ` Michal Hocko
2020-06-17 13:37 ` Naresh Kamboju
2020-06-17 13:57 ` Chris Down
2020-06-17 14:11 ` Michal Hocko
2020-06-17 15:53 ` Naresh Kamboju
2020-06-17 16:06 ` Michal Hocko
2020-06-17 20:13 ` Naresh Kamboju
2020-06-17 21:09 ` Chris Down
2020-06-18 1:43 ` Yafang Shao
2020-06-18 12:37 ` Chris Down
2020-06-18 12:41 ` Michal Hocko
2020-06-18 12:49 ` Chris Down
2020-06-18 14:59 ` Yafang Shao
2020-06-17 13:59 ` Michal Hocko
2020-06-17 14:08 ` Chris Down
2020-05-21 2:39 ` Yafang Shao
2020-05-21 8:58 ` Naresh Kamboju
2020-05-21 9:47 ` Yafang Shao
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