Re: [patch 09/12] Fix SMP poweroff hangs

Olof Johansson
2007-10-09T15:12:15Z

On Mon, Oct 08, 2007 at 11:06:33AM -0700, Greg KH wrote:
> From: Mark Lord <lkml@rtr.ca>
>
> commit 4047727e5ae33f9b8d2b7766d1994ea6e5ec2991 from upstream
>
> We need to disable all CPUs other than the boot CPU (usually 0) before
> attempting to power-off modern SMP machines. This fixes the
> hang-on-poweroff issue on my MythTV SMP box, and also on Thomas Gleixner's
> new toybox.

Paul Mackerras has reported crashes when rebooting some older ppc64
systems due to this patch.

See http://ozlabs.org/pipermail/linuxppc-dev/2007-October/043969.html.

-Olof