linux-kernel - Re: [PROBLEM] 2.6.22-rc2 panics on x86-64 with slub

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Message-ID: <441137.33501.qm@web52606.mail.re2.yahoo.com>
Date:	Tue, 22 May 2007 21:26:40 +1000 (EST)
From:	Srihari Vijayaraghavan <sriharivijayaraghavan@...oo.com.au>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Christoph Lameter <clameter@....com>,
	Hugh Dickins <hugh@...itas.com>,
	Oliver Xymoron <oxymoron@...te.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PROBLEM] 2.6.22-rc2 panics on x86-64 with slub

--- Ingo Molnar <mingo@...e.hu> wrote:
[...]
> yes - PROVE_LOCKING reactivates spinlocks even on UP. At least this 
> suggests that you'd have gotten the hang even with maxcpus=1 - i.e. the 
> spinlock corruption is not caused by some genuine SMP race.
 
You're right on the mark there: even with maxcpus=1 or nosmp (or with both),
with PROVE_LOCKING it hung with slub. I didn't mention that so not to confuse
the matter, but you rightly figured that out too.

Thanks



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