Re: perf hw in kexeced kernel broken in tip

[Peter Zijlstra]

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?
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