linux-kernel - Re: Linux 2.6.25-rc2

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Message-ID: <alpine.LFD.1.00.0802190835390.7833@woody.linux-foundation.org>
Date:	Tue, 19 Feb 2008 08:38:53 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Eric Dumazet <dada1@...mosbay.com>
cc:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Torsten Kaiser <just.for.lkml@...glemail.com>,
	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Christoph Lameter <clameter@....com>
Subject: Re: Linux 2.6.25-rc2



On Tue, 19 Feb 2008, Eric Dumazet wrote:
> 
> cmpxchg_local(&c->freelist, object, object[c->offset]) can succeed,
> while an interrupt came (on this cpu), and several allocations were done,
> and one free was performed at the end of this interruption, so 'object'
> was recycled.

I think you may well be right. This looks like a good clue.

I'll do the revert. I wanted either a confirmation that reveting it 
actually fixes something, _or_ an actual bug description, and this seems 
to be a quite possible case of the latter.

			Linus
	
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