linux-kernel - Re: [Bug 12492] Re: [patch 1/2] stop_machine: introduce stop_machine

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Date:	Tue, 27 Jan 2009 11:09:16 +0100
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Rusty Russell <rusty@...tcorp.com.au>,
	linux-kernel@...r.kernel.org, Tomas Carnecky <tom@...ervice.com>,
	bugme-daemon@...zilla.kernel.org
Subject: Re: [Bug 12492] Re: [patch 1/2] stop_machine: introduce
 stop_machine_create/destroy.

On Tue, 27 Jan 2009 01:52:02 -0800
Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Tue, 27 Jan 2009 00:04:32 -0800 Andrew Morton <akpm@...ux-foundation.org> wrote:
> >   Commit 9ea09af3bd3090e8349ca2899ca2011bd94cda85 introduced a
> >   regression that caused the kernel to fail to suspend.  The 'sleeping'
> >   LED on the laptop just keeps blinking and the laptop never shuts
> >   down.  I think this was eventually fixed because with 2.6.29-rc1 and
> >   -rc2 the laptop suspends fine, but fails to resume.  When I try to
> >   resume, all I see is a blinking cursor in the top left corner of the
> >   screen.
> > 
> >   I'm using acpi_sleep=s3_bios,s3_mode, suspending using a script
> >   that does: echo mem > /sys/power/state.
> 
> hm.  Re-reading this, it seems to be saying that
> 9ea09af3bd3090e8349ca2899ca2011bd94cda85 might be innocent, and that
> some other patch might have caused the resume regression?

Yes, I already updated the bugzilla entry at kernel.org:

The bug introduced with the introduction of stop_machine_create/destroy
was fixed with a0e280e0f33f6c859a235fb69a875ed8f3420388
"stop_machine/cpu hotplug: fix disable_nonboot_cpus".
Must be something else.
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