From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [patch 00/47] Sparse irq rework
Date: Sat, 9 Oct 2010 14:12:14 +0200 (CEST)
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To: Yinghai Lu <yinghai@kernel.org>
Cc: Grant Likely <grant.likely@secretlab.ca>, Russell King - ARM Linux <linux@arm.linux.org.uk>, LKML <linux-kernel@vger.kernel.org>, linux-arch@vger.kernel.org, Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@linux-foundation.org>, x86@kernel.org, Peter Zijlstra <peterz@infradead.org>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mundt <lethal@linux-sh.org>, David Woodhouse <dwmw2@infradead.org>, Jesse Barnes <jbarnes@virtuousgeek.org>, "Eric W. Biederman" <ebiederm@xmission.com>

On Sat, 9 Oct 2010, Yinghai Lu wrote:
> On 10/08/2010 11:10 PM, Thomas Gleixner wrote:
> >> [   59.449366] IP: [<ffffffff8147d715>] acpi_pci_irq_find_prt_entry+0x85/0xb1
> > 
> > I can hardly see how this is related to the irq work.
> > 
> >> [   71.076886] Pid: 1, comm: swapper Tainted: G        W   2.6.36-rc7-tip-yh-01944-ge8a4c5f-dirty #171      /Sun Fire x4800
> >> [   71.096947] RIP: 0010:[<ffffffff8141e232>]  [<ffffffff8141e232>] strcmp+0x4/0x21
> > 
> > Ditto.
> 
> don't know.
> 
> but without merging your branch, those problems don't come out.
> 
> only thing i can think about that you real free irq code could
> stress or expose other subsystem's bug etc.

The first crash is in early boot and that code just fiddles with acpi
internal stuff.

Is that fully reproducible ? If yes, any chance you can bisect it ?

Thanks,

	tglx