linux-kernel - Re: [PATCH] x86/x86_64: warn of -EBUSY returns from __assign_irq

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Message-ID: <m1fxea8tml.fsf@fess.ebiederm.org>
Date:	Mon, 08 Jun 2009 11:31:30 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Gary Hade <garyhade@...ibm.com>
Cc:	mingo@...e.hu, mingo@...hat.com, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, hpa@...or.com, x86@...nel.org,
	yinghai@...nel.org, suresh.b.siddha@...el.com, lcm@...ibm.com
Subject: Re: [PATCH] x86/x86_64: warn of -EBUSY returns from __assign_irq_vector()

Gary Hade <garyhade@...ibm.com> writes:

> Impact: helps expose unexpected issues
>
> Since we have seen one case where an unexpected -EBUSY
> return from __assign_irq_vector() was included in the
> series of events that caused a serious problem
>   re: http://lkml.org/lkml/2009/6/2/377
> we should warn to help expose similar unexpected issues
> in the future.
>
> Signed-off-by: Gary Hade <garyhade@...ibm.com>

Gary again can you make the case that this is not a problem
with fixup_irqs?

Changing the rest of the code to match the always broken
assumptions in fixup_irqs is the tail wagging the dog.

Eric
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