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

Rafael J. Wysocki
2007-03-25T18:53:59Z

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@m3y3r.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