On Mon, Jun 29, 2009 at 04:41:17PM +0300, Avi Kivity wrote:
> kerneloops.org shows tons of oopses on amd, see
> http://www.kerneloops.org/oops.php?number=79008. I suspect this has to
> do with resuming a laptop while a guest is running. Can anyone confirm
> or deny?
I havn't verified this yet but it may have to do with dirty caches that
are not written back to memory in suspend-to-ram and are thus lost. The
resume code-path looks otherwise sane to me. The only thing I can
imagine is that a bit in the cpu_hardware_enabled cpumask is wrong after
resume.
Btw. it is guaranteed that with cpu-hotplug the cpu isn't already
executing processes when the CPU_ONLINE event call chain is called?
At least the CPU is marked online and active at that point in time.
Joerg
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