Messages in this thread | | | Subject | Re: [PATCH -mm] kexec jump -v9 | From | "Huang, Ying" <> | Date | Fri, 16 May 2008 09:55:02 +0800 |
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On Thu, 2008-05-15 at 18:35 -0700, Eric W. Biederman wrote: > Vivek Goyal <vgoyal@redhat.com> writes: > > > ioapic_suspend() is not putting APICs in Legacy mode and that's why > > we are seeing the issue. It only saves the IOAPIC routing table entries > > and these entries are restored during ioapic_resume(). > > > > But I think somebody has to put APICs in legacy mode for normal > > hibernation also. Not sure who does it. May be BIOS, so that during > > resume, second kernel can get the timer interrupts. > > I doubt anything cares in the suspend to ram case. There should just > be a small BIOS trampoline to get back to linux when the processor > restarts. And you don't need interrupts for any of that.
As far as I know, in suspend to ram, interrupt is used as waking up event, such as, keyboard interrupt.
Best Regards, Huang Ying
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