From: Michal Hocko <mhocko@kernel.org>
To: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: vdavydov@virtuozzo.com, hannes@cmpxchg.org, rientjes@google.com,
linux-mm@kvack.org
Subject: Re: oom: Bogus "sysrq: OOM request ignored because killer is disabled" message
Date: Mon, 3 Apr 2017 10:38:01 +0200 [thread overview]
Message-ID: <20170403083800.GF24661@dhcp22.suse.cz> (raw)
In-Reply-To: <201704021252.GIF21549.QFFOFOMVJtHSLO@I-love.SAKURA.ne.jp>
On Sun 02-04-17 12:52:55, Tetsuo Handa wrote:
> I noticed that SysRq-f prints
>
> "sysrq: OOM request ignored because killer is disabled"
>
> when no process was selected (rather than when oom killer was disabled).
> This message was not printed until Linux 4.8 because commit 7c5f64f84483bd13
> ("mm: oom: deduplicate victim selection code for memcg and global oom") changed
> from "return true;" to "return !!oc->chosen;" when is_sysrq_oom(oc) is true.
>
> Is this what we meant?
>
> [ 713.805315] sysrq: SysRq : Manual OOM execution
> [ 713.808920] Out of memory: Kill process 4468 ((agetty)) score 0 or sacrifice child
> [ 713.814913] Killed process 4468 ((agetty)) total-vm:43704kB, anon-rss:1760kB, file-rss:0kB, shmem-rss:0kB
> [ 714.004805] sysrq: SysRq : Manual OOM execution
> [ 714.005936] Out of memory: Kill process 4469 (systemd-cgroups) score 0 or sacrifice child
> [ 714.008117] Killed process 4469 (systemd-cgroups) total-vm:10704kB, anon-rss:120kB, file-rss:0kB, shmem-rss:0kB
> [ 714.189310] sysrq: SysRq : Manual OOM execution
> [ 714.193425] sysrq: OOM request ignored because killer is disabled
> [ 714.381313] sysrq: SysRq : Manual OOM execution
> [ 714.385158] sysrq: OOM request ignored because killer is disabled
> [ 714.573320] sysrq: SysRq : Manual OOM execution
> [ 714.576988] sysrq: OOM request ignored because killer is disabled
So, what about this?
---
next prev parent reply other threads:[~2017-04-03 8:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-02 3:52 Tetsuo Handa
2017-04-03 8:38 ` Michal Hocko [this message]
2017-04-03 9:11 ` Michal Hocko
2017-04-03 10:10 ` Tetsuo Handa
2017-04-03 10:10 ` Vladimir Davydov
2017-04-03 10:20 ` Michal Hocko
2017-04-04 13:23 ` Michal Hocko
2017-04-04 13:36 ` Vladimir Davydov
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