[PATCH -mm] kexec jump -v9

Eric W. Biederman ebiederm at xmission.com
Thu May 15 14:42:03 EDT 2008

"Huang, Ying" <ying.huang at intel.com> writes:

> Hi, Vivek,
> On Wed, 2008-05-14 at 16:52 -0400, Vivek Goyal wrote:
> [...]
>> Ok, I have done some testing on this patch. Currently I have just
>> tested switching back and forth between two kernels and it is working for
>> me.
>> Just that I had to put LAPIC and IOAPIC in legacy mode for it to work. Few
>> comments/questions are inline.
> It seems that for LAPIC and IOAPIC, there is
> lapic_suspend()/lapic_resume() and ioapic_suspend()/ioapic_resume(),
> which will be called before/after kexec jump through
> device_power_down()/device_power_up(). So, the mechanism for
> LAPIC/IOAPIC is there, we may need to check the corresponding
> implementation.

And if you start with the device shutdown path the code is already
there and working.


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