linux-kernel - Re: patch revert-fix-smp-poweroff-hangs.patch queued to -stable tree

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Message-ID: <20071213173041.GB28148@redhat.com>
Date:	Thu, 13 Dec 2007 12:30:41 -0500
From:	Dave Jones <davej@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Mark Lord <lkml@....ca>, akpm@...ux-foundation.org,
	mlord@...ox.com, rjw@...k.pl, tglx@...utronix.de,
	torvalds@...ux-foundation.org, stable@...nel.org,
	stable-commits@...r.kernel.org
Subject: Re: patch revert-fix-smp-poweroff-hangs.patch queued to -stable
	tree

On Thu, Dec 13, 2007 at 08:45:45AM -0800, Greg KH wrote:
 > >> There still is a remaining shutdown problem in 2.6.22 with old APM based
 > >> systems, but this fix is not the correct one
 > > ..
 > >
 > > Eh?  It may not fix APM systems, but it *does* fix several known examples
 > > of ACPI systems.
 > 
 > And I have a large number of real systems that this patch has caused
 > problems with.  So much so that we had to revert it from a shipping SuSE
 > product already, so I figured it was safe to also revert this in
 > mainline as it did cause regressions.

Cheesy, but why not something like..

+	if (acpi_enabled)		// Or whatever the var name is these days
+		disable_nonboot_cpus();

until we find out more?

	Dave

-- 
http://www.codemonkey.org.uk
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