Re: perf hw in kexeced kernel broken in tip

Peter Zijlstra
2010-12-01T19:38:04Z

On Wed, 2010-12-01 at 11:23 -0500, Vivek Goyal wrote:
> > What does kexec normally do to ensure hardware is left in a sane state?
>
> Typically calls device_shutdown() and sysdev_shutdown() from
> kernel_restart_prepare() to shutdown the devices.
>
> Also calls machine_shutdown() which depending on architecture can take
> care of various things like stopping other cpus, shutting down LAPIC,
> disabling IOAPIC, disabling hpet, shutting down IOMMU etc
> (native_machine_shutdown()).

So basically there's no sane generic reset callout?