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

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Message-ID: <86802c440804150123u5ddc4449sfa97538fe3970149@mail.gmail.com>
Date:	Tue, 15 Apr 2008 01:23:32 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>
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

On Tue, Apr 15, 2008 at 1:17 AM, Ingo Molnar <mingo@...e.hu> wrote:
>
>  * 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...
typo: should be "that does *not* 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.

i keep using kexec back and forth to avoid BIOS post stage.

YH
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