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Date: Tue, 22 May 2007 18:26:33 +1000 (EST)
From: Srihari Vijayaraghavan <sriharivijayaraghavan@yahoo.com.au>
Subject: Re: [PROBLEM] 2.6.22-rc2 panics on x86-64 with slub
To: Christoph Lameter <clameter@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>, Hugh Dickins <hugh@veritas.com>,
       Oliver Xymoron <oxymoron@waste.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       Jens Axboe <jens.axboe@oracle.com>, linux-kernel@vger.kernel.org
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Just another data point: with the flick of CONFIG_SMP, I'm in control of the
hangs/crashes ;-).

Yup, with CONFIG_SMP=n, I'm unable to reproduce the problem. It's quite stable
actually (having completed a dozen kernel compile sessions so far).

I suspected this after seeing spinlock issues on both cores of my CPU in my
earlier report. Just a stab in the dark with some unexpected luck :-).

(Tested on http://www.kernel.org/hg/linux-2.6 changeset at 57106:3f42ad5de7cd.
That's the latest hg commit there.)

Thanks

PS: For the record everything except sysrq support is disabled in the kernel
hacking section. Also the CONFIG_SLAB_DEBUG is off. Kernel preemption is also
off, after proving it had no influence. Just to keep the test case simple.


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