linux-kernel - Re: Reworking suspend-resume sequence (was: Re: PCI PM: Restore standard config registers of all devices early)

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Date:	Thu, 5 Mar 2009 09:19:08 +0100
From:	Pavel Machek <pavel@....cz>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Jesse Barnes <jesse.barnes@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andreas Schwab <schwab@...e.de>, Len Brown <lenb@...nel.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: Reworking suspend-resume sequence (was: Re: PCI PM: Restore
	standard config registers of all devices early)

On Thu 2009-03-05 10:25:04, Benjamin Herrenschmidt wrote:
> 
> > As long as we claim to support cpu hotplug, suspending the cpus early
> > should work. User might have unplugged the cpu manually...
> > 
> > If something is broken in acpi, we may need to disable  cpu*/onlone on
> >  affected systems.
> 
> You seem to miss some context here... it seems that ACPI mandates that
> CPUs are suspended after devices and you know that we can't just start
> blacklisting half of the machines out there just because we happen not
> to do the same as what Windows does...

I did not see that ACPI mandate... where is it?

 That would interfere with user's ability to online/offline cpus,
badly.

Are you saying that we should online all the CPUs before starting
suspend to stay on the "safe side"?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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