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. Best Regards, Huang Ying