linux-kernel - Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead

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Message-Id: <20071031.180906.155917087.davem@davemloft.net>
Date:	Wed, 31 Oct 2007 18:09:06 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	clameter@....com
Cc:	akpm@...ux-foundation.org, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org, mathieu.desnoyers@...ymtl.ca,
	penberg@...helsinki.fi
Subject: Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu
 access overhead

From: Christoph Lameter <clameter@....com>
Date: Wed, 31 Oct 2007 18:01:34 -0700 (PDT)

> On Wed, 31 Oct 2007, David Miller wrote:
> 
> > Without DEBUG_VM I get a loop of crashes shortly after SSHD
> > is started, I'll try to track it down.
> 
> Check how much per cpu memory is in use by
> 
> cat /proc/vmstat
> 
> currently we have a 32k limit there.

It crashes when SSHD starts, the serial console GETTY hasn't
started up yet so I can't even log in to run those commands
Christoph.

All I can do now is bisect and then try to figure out what about the
guilty change might cause the problem.

This is on a 64-cpu sparc64 box, and fast cmpxchg local is not set, so
maybe it's one of the locking changes.
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