linux-kernel - Re: [patch 1/5] oom: cleanup android low memory killer

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Date:	Thu, 14 May 2009 21:23:13 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	kosaki.motohiro@...fujitsu.com, Rik van Riel <riel@...hat.com>,
	Greg KH <greg@...ah.com>, Arve Hjonnevag <arve@...roid.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>, San Mehat <san@...roid.com>,
	linux-kernel@...r.kernel.org, Greg KH <gregkh@...e.de>
Subject: Re: [patch 1/5] oom: cleanup android low memory killer


sorry late responce.

> On Mon, 4 May 2009, Rik van Riel wrote:
> 
> > > There was an interest in a low mem userspace notifier that applications can
> > > poll() on at configurable low mem levels to react accordingly.  This would
> > > probably address the problem that the Android team is trying to fix.
> > 
> > This would also make it easier for virtual machines to be
> > ballooned down to size when the host experiences memory
> > pressure.
> > 
> > The low memory notification could also be useful for JVMs,
> > databases that do (some of) their own caching and any garbage
> > collected program in general.
> > 
> 
> I agree, and I'd suggest that it be implemented as a cgroup so that 
> individual sets of tasks can be responsible for their own lowmem 
> notifiers.
> 
> KOSAKI, you were pushing the /dev/mem_notify patchset last year from 
> Marcelo.  Do you have any plans of recreating that in a cgroup or have you 
> dropped it?

sorry, I've pending this because I think I have to stabilize VM 
as top priority.

I can't say when I resume this works, sorry.



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