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Re: 2.6.39-rc4+: oom-killer busy killing tasks

To: Minchan Kim <minchan.kim@xxxxxxxxx>
Subject: Re: 2.6.39-rc4+: oom-killer busy killing tasks
From: Christian Kujau <lists@xxxxxxxxxxxxxxx>
Date: Thu, 21 Apr 2011 20:03:27 -0700 (PDT)
Cc: LKML <linux-kernel@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <BANLkTi=P5z4iON+ULiUEAeuuCJCJ_nMxWw@xxxxxxxxxxxxxx>
References: <alpine.DEB.2.01.1104211841510.18728@xxxxxxxxxxxxxx> <BANLkTi=P5z4iON+ULiUEAeuuCJCJ_nMxWw@xxxxxxxxxxxxxx>
User-agent: Alpine 2.01 (DEB 1266 2009-07-14)
On Fri, 22 Apr 2011 at 11:58, Minchan Kim wrote:
> But I wonder why VM can't reclaim the pages. As I see the log, there
> are lots of slab pages(710M) in DMA zone while LRU pages are very
> small. SLAB pages are things VM has a trouble to reclaim. I am not
> sure 710M of SLAB is reasonable size. Don't you have experience same
> problem in old kernel?

No, I forgot to add 2.6.38 (and before) did not show that behaviour.

> If you see the problem first in 2.6.39-rc4, maybe it would be a
> regression(ex, might be slab memory leak)

I would think so. I'll try to bisect, but with one compilation taking 
~20min on this box, this might take a while.

> Could you get the information about slabinfo(ex, cat /proc/slabinfo)
> right before OOM happens.

When it happens again, I'll try to get this.

Thanks for replying,
BOFH excuse #73:

Daemons did it

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