linux-kernel - Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks

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Message-ID: <20160115101218.GB14112@dhcp22.suse.cz>
Date:	Fri, 15 Jan 2016 11:12:18 +0100
From:	Michal Hocko <mhocko@...nel.org>
To:	David Rientjes <rientjes@...gle.com>
Cc:	linux-mm@...ck.org,
	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC 1/3] oom, sysrq: Skip over oom victims and killed tasks

On Thu 14-01-16 13:51:16, David Rientjes wrote:
> I think it's time to kill sysrq+F and I'll send those two patches
> unless there is a usecase I'm not aware of.

I have described one in the part you haven't quoted here. Let me repeat:
: Your system might be trashing to the point you are not able to log in
: and resolve the situation in a reasonable time yet you are still not
: OOM. sysrq+f is your only choice then.

Could you clarify why it is better to ditch a potentially usefull
emergency tool rather than to make it work reliably and predictably?
-- 
Michal Hocko
SUSE Labs