linux-kernel - Re: [RFC][-mm][PATCH 0/6] oom-killer: total renewal

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Date:	Wed, 4 Nov 2009 08:56:04 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	minchan.kim@...il.com, vedran.furac@...il.com,
	Hugh Dickins <hugh.dickins@...cali.co.uk>
Subject: Re: [RFC][-mm][PATCH 0/6] oom-killer: total renewal

On Tue, 3 Nov 2009 12:34:13 -0800 (PST)
David Rientjes <rientjes@...gle.com> wrote:

> On Mon, 2 Nov 2009, KAMEZAWA Hiroyuki wrote:
> 
> > Hi, as discussed in "Memory overcommit" threads, I started rewrite.
> > 
> > This is just for showing "I started" (not just chating or sleeping ;)
> > 
> > All implemtations are not fixed yet. So feel free to do any comments.
> > This set is for minimum change set, I think. Some more rich functions
> > can be implemented based on this.
> > 
> > All patches are against "mm-of-the-moment snapshot 2009-11-01-10-01"
> > 
> > Patches are organized as
> > 
> > (1) pass oom-killer more information, classification and fix mempolicy case.
> > (2) counting swap usage
> > (3) counting lowmem usage
> > (4) fork bomb detector/killer
> > (5) check expansion of total_vm
> > (6) rewrite __badness().
> > 
> > passed small tests on x86-64 boxes.
> > 
> 
> Thanks for looking into improving the oom killer!
> 
Thank you for review.

> I think it would be easier to merge the four different concepts you have 
> here:
> 
>  - counting for swap usage (patch 2),
> 
>  - oom killer constraint reorganization (patches 1 and 3),
> 
>  - fork bomb detector (patch 4), and 
> 
>  - heuristic changes (patches 5 and 6)
> 
> into seperate patchsets and get them merged one at a time.

yes, I will do so. I think we share total view of final image.

> I think patch 2 can easily be merged into -mm now, and patches 1 and 3 could
> be merged after cleaned up. 
ok, maybe patch 1 should be separated more.

>We'll probably need more discussion on the rest.
> 
agreed.

> Patches 1 and 6 have whitespace damage, btw.
Oh, will fix.

Thanks,
-Kame


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