linux-kernel - Re: [RFC][PATCH 0/2] Rework disabling of interrupts during suspend-resume

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Message-ID: <m1skm6cd3z.fsf@fess.ebiederm.org>
Date:	Sun, 22 Feb 2009 14:37:20 -0800
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Len Brown <lenb@...nel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [RFC][PATCH 0/2] Rework disabling of interrupts during suspend-resume

"Rafael J. Wysocki" <rjw@...k.pl> writes:

> Moreover, the real purpose of these changes is to be able to execute the
> "late" suspend and "early" resume device callbacks with timer interrupts
> enabled, so that they can use mutexes etc.  However, x86 currently doesn't set
> the IRQF_TIMER flag and I need to make it do so before going further in this
> direction and changing the PCI PM framework to take advantage of the $subject
> changes, for example.  So, I need to know how to modify x86 timer code so that
> the IRQF_TIMER flag is set by it.

How does this sync with the ACPI requirement that the it's late suspend MUST
happen with irqs disabled?

Eric
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