From: Naresh Kamboju <naresh.kamboju@linaro.org>
To: Chris Down <chris@chrisdown.name>
Cc: Yafang Shao <laoar.shao@gmail.com>,
Michal Hocko <mhocko@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Roman Gushchin <guro@fb.com>, linux-mm <linux-mm@kvack.org>,
Cgroups <cgroups@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>,
lkft-triage@lists.linaro.org
Subject: Re: [PATCH v3 2/2] mm, memcg: Decouple e{low,min} state mutations from protection checks
Date: Fri, 22 May 2020 21:11:53 +0530 [thread overview]
Message-ID: <CA+G9fYvw+oY-EK1+FYCUAD5-UGD4MhBGJHasjF+L5nLtzL2GLQ@mail.gmail.com> (raw)
In-Reply-To: <20200522114544.GA1112005@chrisdown.name>
On Fri, 22 May 2020 at 17:15, Chris Down <chris@chrisdown.name> wrote:
>
> Naresh Kamboju writes:
> >This patch is causing oom-killer while running mkfs -t ext4 on i386 kernel
> >running on x86_64 machine version linux-next 5.7.0-rc6-next-20200521.
>
> I think I see what's wrong here -- if we bail out early, memory.e{min,low}
> might be uninitialised.
>
> Does this patch fix it, by any chance?
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index d3b23c57bed4..aa902b9cbb79 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -5046,6 +5046,9 @@ mem_cgroup_css_alloc(struct cgroup_subsys_state *parent_css)
> memory_cgrp_subsys.broken_hierarchy = true;
> }
>
> + memcg->memory.emin = 0;
> + memcg->memory.elow = 0;
> +
> /* The following stuff does not apply to the root */
> if (!parent) {
> #ifdef CONFIG_MEMCG_KMEM
This patch did not fix the problem.
The test log showing oom-killer link,
https://lkft.validation.linaro.org/scheduler/job/1445128#L1194
Build images:
https://builds.tuxbuild.com/YqW37GVsCHf8ndxOT2z1iQ/
- Naresh
next prev parent reply other threads:[~2020-05-22 15:42 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-05 8:41 [PATCH v3 0/2] mm: memcontrol: memory.{low,min} reclaim fix & cleanup Yafang Shao
2020-05-05 8:41 ` [PATCH v3 1/2] mm, memcg: Avoid stale protection values when cgroup is above protection Yafang Shao
2020-05-05 8:41 ` [PATCH v3 2/2] mm, memcg: Decouple e{low,min} state mutations from protection checks Yafang Shao
2020-05-22 11:01 ` Naresh Kamboju
2020-05-22 11:45 ` Chris Down
2020-05-22 15:41 ` Naresh Kamboju [this message]
2020-05-22 12:18 ` Yafang Shao
2020-05-22 15:52 ` Naresh Kamboju
2020-05-22 15:59 ` Yafang Shao
2020-05-22 16:06 ` Chris Down
2020-05-22 16:07 ` Chris Down
2020-05-22 16:27 ` Yafang Shao
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