linux-kernel - Re: [patch 0/7] improve memcg oom killer robustness v2

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Message-ID: <20130916152548.GF3674@dhcp22.suse.cz>
Date:	Mon, 16 Sep 2013 17:25:48 +0200
From:	Michal Hocko <mhocko@...e.cz>
To:	azurIt <azurit@...ox.sk>
Cc:	Johannes Weiner <hannes@...xchg.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-mm@...ck.org, cgroups@...r.kernel.org, x86@...nel.org,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [patch 0/7] improve memcg oom killer robustness v2

On Mon 16-09-13 17:05:43, azurIt wrote:
> > CC: "Johannes Weiner" <hannes@...xchg.org>, "Andrew Morton" <akpm@...ux-foundation.org>, "David Rientjes" <rientjes@...gle.com>, "KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>, "KOSAKI Motohiro" <kosaki.motohiro@...fujitsu.com>, linux-mm@...ck.org, cgroups@...r.kernel.org, x86@...nel.org, linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
> >On Mon 16-09-13 16:13:16, azurIt wrote:
> >[...]
> >> >You can use sysrq+l via serial console to see tasks hogging the CPU or
> >> >sysrq+t to see all the existing tasks.
> >> 
> >> 
> >> Doesn't work here, it just prints 'l' resp. 't'.
> >
> >I am using telnet for accessing my serial consoles exported by
> >the multiplicator or KVM and it can send sysrq via ctrl+t (Send
> >Break). Check your serial console setup.
> 
> 
> 
> I'm using Raritan KVM and i created keyboard macro 'sysrq + l' resp.
> 'sysrq + t'. I'm also unable to use it on my local PC. Maybe it needs
> to be enabled somehow?

Probably yes. echo 1 > /proc/sys/kernel/sysrq should enable all sysrq
commands. You can select also some of them (have a look at
Documentation/sysrq.txt for more information)
-- 
Michal Hocko
SUSE Labs
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