linux-kernel - Re: [PATCH v15 2/2] Add oom victim's memcg to the oom context information

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Message-ID: <20181122133954.GI18011@dhcp22.suse.cz>
Date:   Thu, 22 Nov 2018 14:39:54 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     ufo19890607@...il.com
Cc:     akpm@...ux-foundation.org, rientjes@...gle.com,
        kirill.shutemov@...ux.intel.com, aarcange@...hat.com,
        penguin-kernel@...ove.sakura.ne.jp, guro@...com,
        yang.s@...baba-inc.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, yuzhoujian@...ichuxing.com
Subject: Re: [PATCH v15 2/2] Add oom victim's memcg to the oom context
 information

On Wed 21-11-18 19:29:59, ufo19890607@...il.com wrote:
> From: yuzhoujian <yuzhoujian@...ichuxing.com>
> 
> The current oom report doesn't display victim's memcg context during the
> global OOM situation. While this information is not strictly needed, it
> can be really helpful for containerized environments to locate which
> container has lost a process. Now that we have a single line for the oom
> context, we can trivially add both the oom memcg (this can be either
> global_oom or a specific memcg which hits its hard limits) and task_memcg
> which is the victim's memcg.
> 
> Below is the single line output in the oom report after this patch.
> - global oom context information:
> oom-kill:constraint=<constraint>,nodemask=<nodemask>,cpuset=<cpuset>,mems_allowed=<mems_allowed>,global_oom,task_memcg=<memcg>,task=<comm>,pid=<pid>,uid=<uid>
> - memcg oom context information:
> oom-kill:constraint=<constraint>,nodemask=<nodemask>,cpuset=<cpuset>,mems_allowed=<mems_allowed>,oom_memcg=<memcg>,task_memcg=<memcg>,task=<comm>,pid=<pid>,uid=<uid>
> 
> Signed-off-by: yuzhoujian <yuzhoujian@...ichuxing.com>

I thought I have acked this one already.
Acked-by: Michal Hocko <mhocko@...e.com>
-- 
Michal Hocko
SUSE Labs