Re: [PATCH 0/11] ACPI: Fixes and cleanups related to iomaps management

Rafael J. Wysocki
2011-01-23T20:28:34Z

On Sunday, January 23, 2011, Jeff Chua wrote:
> On Sun, Jan 23, 2011 at 3:12 AM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> > On Saturday, January 22, 2011, Jeff Chua wrote:
> >> 2011/1/22 Rafael J. Wysocki <rjw@sisk.pl>:
> >> > On Saturday, January 22, 2011, Jeff Chua wrote:
> >>
> >> > means that my patch [11/11] _and_ the replacement are totally wrong, because you have
> >> > _multiple_ NVS regions. That really helped, thanks a lot.
> >>
> >> Would it be different if I offline all CPUs before suspending to ram?
> >> It seems to help with suspending to disk.
> >
> > No, that doesn't matter. NVS regions are just sitting there regardless of
> > what happens at run time.
>
> Strange. If I didn't offline, it hanged during suspend even without
> thinkpad_acpi. I could see that the suspend code does the offline
> automatically, but executing the offline before calling suspend makes
> it no hanging.

That means there's a problem in the CPU hotplug code that manifests itslef
during suspend. Is this 100% reproducible? Did it happen with 2.6.37?

Rafael