From: Steven Rostedt <rostedt@goodmis.org>
To: Zhaoyang Huang <huangzhaoyang@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v1] ringbuffer: Don't choose the process with adj equal OOM_SCORE_ADJ_MIN
Date: Mon, 9 Apr 2018 09:49:44 -0400 [thread overview]
Message-ID: <20180409094944.6399b211@gandalf.local.home> (raw)
In-Reply-To: <CAGWkznEQbaw7HMvE1pbVDMriOL8yW74Ka5UEci4YFRdLnVbFzA@mail.gmail.com>
On Mon, 9 Apr 2018 08:56:01 +0800
Zhaoyang Huang <huangzhaoyang@gmail.com> wrote:
> >>
> >> if (oom_task_origin(task)) {
> >> points = ULONG_MAX;
> >> goto select;
> >> }
> >>
> >> points = oom_badness(task, NULL, oc->nodemask, oc->totalpages);
> >> if (!points || points < oc->chosen_points)
> >> goto next;
> >
> > And what's wrong with that?
> >
> > -- Steve
> I think the original thought of OOM is the flag 'OOM_SCORE_ADJ_MIN' is
> most likely to be set by process himself via accessing the proc file,
> if it does so, OOM can select it as the victim. except, it is
> reluctant to choose the critical process to be killed, so I suggest
> not to set such heavy flag as OOM_SCORE_ADJ_MIN on behalf of -1000
> process.
Really, I don't think tasks that are setting OOM_CORE_ADJ_MIN should be
allocating a lot of memory in the kernel (via ring buffer). It sounds
like a good way to wreck havoc on the system.
It's basically saying, "I'm going to take up all memory, but don't kill
me, just kill some random user on the system".
-- Steve
next prev parent reply other threads:[~2018-04-09 13:49 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-08 2:16 [PATCH v1] ringbuffer: Don't choose the process with adj equal OOM_SCORE_ADJ_MIN Zhaoyang Huang
2018-04-08 3:48 ` Steven Rostedt
2018-04-08 5:54 ` Zhaoyang Huang
2018-04-08 12:47 ` Steven Rostedt
2018-04-09 0:56 ` Zhaoyang Huang
2018-04-09 13:49 ` Steven Rostedt [this message]
2018-04-10 0:32 ` Zhaoyang Huang
2018-04-10 2:32 ` Zhaoyang Huang
2018-04-10 3:12 ` Steven Rostedt
2018-04-10 3:41 ` Zhaoyang Huang
2018-04-10 6:14 ` Michal Hocko
2018-04-10 6:39 ` Zhaoyang Huang
2018-04-10 7:49 ` Michal Hocko
2018-04-10 8:04 ` Zhaoyang Huang
2018-04-10 8:12 ` Michal Hocko
2018-04-10 8:38 ` Zhaoyang Huang
2018-04-10 9:01 ` Michal Hocko
2018-04-10 9:32 ` Zhaoyang Huang
2018-04-10 9:51 ` Zhaoyang Huang
2018-04-10 10:49 ` Michal Hocko
2018-04-10 12:23 ` Steven Rostedt
2018-04-10 12:27 ` Michal Hocko
2018-04-10 12:36 ` Steven Rostedt
2018-04-10 13:13 ` Steven Rostedt
2018-04-10 13:14 ` Steven Rostedt
2018-04-10 16:45 ` Joel Fernandes
2018-04-10 18:00 ` Steven Rostedt
2018-04-10 18:39 ` Joel Fernandes
2018-04-10 19:05 ` Steven Rostedt
2018-04-11 7:48 ` Zhaoyang Huang
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