linux-kernel - Re: regression caused by: genirq: do not leave interupts enabled on free

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Message-ID: <20080415081744.GB19452@elte.hu>
Date:	Tue, 15 Apr 2008 10:17:44 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yhlu.kernel@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jeff Garzik <jeff@...zik.org>,
	Ayaz Abdulla <aabdulla@...dia.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: regression caused by: genirq: do not leave interupts enabled
	on free_irq


* Yinghai Lu <yhlu.kernel@...il.com> wrote:

> >  Do we think it's a bug in the RHEL 5.1 kernel?  Even so, that's a 
> >  problem for the 2.6.25 kernel.
> 
> it is RHEL 5.1 kernel problem, it has code for maskbit with msi there, 
> but that does work...

addendum - basically the argument is: we should kexec conservatively - 
i.e. we should leave as few assumptions and hw changes around as 
possible. So restoring the MSI state is fair enough as a robustness fix, 
even though only kexec to older kernels is affected.

clearly 2.6.26 material, not 2.6.25.

	Ingo
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