linux-kernel - RE: [PATCH 1/2] Add mempressure cgroup

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Message-ID: <84FF21A720B0874AA94B46D76DB98269046C33F0@008-AM1MPN1-003.mgdnok.nokia.com>
Date:	Tue, 8 Jan 2013 07:57:25 +0000
From:	<leonid.moiseichuk@...ia.com>
To:	<anton.vorontsov@...aro.org>, <kamezawa.hiroyu@...fujitsu.com>
CC:	<rientjes@...gle.com>, <penberg@...nel.org>, <mgorman@...e.de>,
	<glommer@...allels.com>, <mhocko@...e.cz>, <kirill@...temov.name>,
	<lcapitulino@...hat.com>, <akpm@...ux-foundation.org>,
	<gthelen@...gle.com>, <kosaki.motohiro@...il.com>,
	<minchan@...nel.org>, <b.zolnierkie@...sung.com>,
	<john.stultz@...aro.org>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>, <linaro-kernel@...ts.linaro.org>,
	<patches@...aro.org>, <kernel-team@...roid.com>
Subject: RE: [PATCH 1/2] Add mempressure cgroup

-----Original Message-----
From: ext Anton Vorontsov [mailto:anton.vorontsov@...aro.org] 
Sent: 08 January, 2013 08:30
...
> > +static const uint vmpressure_level_med = 60;
> > +static const uint vmpressure_level_oom = 99;
> > +static const uint vmpressure_level_oom_prio = 4;
> > +
..
Seems vmpressure_level_oom = 99 is quite high if I understand it as a global. If I do not wrong in old version of kernel the kernel only memory border was stated as 1/32 part of available memory meaning no allocation for user-space if amount of free memory reached 1/32. So, decreasing this parameter to 95 or 90 will allow notification to be propagated to user-space and handled.

Best wishes,
Leonid