linux-kernel - Re: 2.6.25-rc5: Reported regressions from 2.6.24

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Date:	Tue, 11 Mar 2008 23:41:41 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Adrian Bunk <bunk@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Natalie Protasevich <protasnb@...il.com>,
	Ingo Molnar <mingo@...e.hu>, Len Brown <len.brown@...el.com>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	Greg KH <greg@...ah.com>
Subject: Re: 2.6.25-rc5: Reported regressions from 2.6.24

On Tuesday, 11 of March 2008, Jeff Garzik wrote:
> Linus Torvalds wrote:
> > On Mon, 10 Mar 2008, Jeff Garzik wrote:
> >>> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=10123
> >>> Subject		: No power-off / reboot with 2.6.25-rcX (up to -rc3)
> 
> >> FWIW, I have this same problem.
> 
> > Jeff, does that one ("keep rd->online and cpu_online_map in sync") fix the 
> > problem for you?
> 
> Nope.  I am running baadac8b10c5ac15ce3d26b68fa266c8889b163f now, and it 
> still hangs on reboot or power-off.
> 
> Interestingly, if I reboot -immediately- from gdm, it succeeds.  However 
> if I login to Fedora GNOME via gdm, and load my standard apps (1001 
> terminals, firefox, tbird, IRC) reboot and poweroff no longer work.
> 
> My guess was always some ACPI regression.  I'll bisect today or 
> tomorrow.  It is reproducible regression that appeared recently (circa 
> 2.6.24 or 2.6.25-rc1 I think), so I should be able to find the culprit.

In http://bugzilla.kernel.org/show_bug.cgi?id=10123 Guennadi says that
reverting

commit fd7d1ced29e5beb88c9068801da7a362606d8273
Author: Greg Kroah-Hartman <gregkh@...e.de>
Date:   Tue May 22 22:47:54 2007 -0400

    PCI: make pci_bus a struct device

fixes the problem for him (this seems to be yet another reboot/poweroff IOW).

Thanks,
Rafael
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