linux-kernel - Re: [3/5] 2.6.21-rc4: known regressions (v2)

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Message-Id: <200703252056.58914.rjw@sisk.pl>
Date:	Sun, 25 Mar 2007 20:56:57 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Thomas Meyer <thomas@...3r.de>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-pci@...ey.karlin.mff.cuni.cz,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Tony Luck <tony.luck@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Len Brown <lenb@...nel.org>
Subject: Re: [3/5] 2.6.21-rc4: known regressions (v2)

On Sunday, 25 March 2007 16:17, Thomas Meyer wrote:
> Rafael J. Wysocki schrieb:
> > On Sunday, 25 March 2007 14:03, Eric W. Biederman wrote:
> >   
> >> Thomas Meyer <thomas@...3r.de> writes:
> >>
> >>     
> >>> Eric W. Biederman schrieb:
> >>>       
> >>>> Thomas could you verify the patch below makes the problem go away
> >>>> for you.
> >>>>   
> >>>>         
> >>> The patch solves the problem. I'm writing this after the third suspend
> >>> and resume cycle.
> >>> msi irq stays enabled for libata device:
> >>> cat /sys/devices/pci0000\:00/0000\:00\:1f.2/irq
> >>> 218
> >>>       
> >>> The first suspend to disk is ok. The second suspend to disk has a
> >>> strange behaviour:
> >>> 1.) write pm image
> >>> 2.) the system disable the non-boot cpus again (i guess this happens in
> >>> power_down())
> >>>       
> >
> > Yes, in kernel/power/disk.c:power_down() .
> >
> > Please comment out the disable_nonboot_cpus() in there and retest (but please
> > test the latest Linus' tree).
> >
> >   
> Without disable_nonboot_cpus in power_down the computer powers down
> without the mysterious "wait for the next interrupt" hang.

Do you have CONFIG_NO_HZ set?

Rafael
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