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Date: Fri, 16 May 2008 09:55:02 +0800 From: "Huang, Ying" <ying.huang@...el.com> To: "Eric W. Biederman" <ebiederm@...ssion.com> CC: Vivek Goyal <vgoyal@...hat.com>, Pavel Machek <pavel@....cz>, nigel@...el.suspend2.net, "Rafael J. Wysocki" <rjw@...k.pl>, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org, Kexec Mailing List <kexec@...ts.infradead.org> Subject: Re: [PATCH -mm] kexec jump -v9 On Thu, 2008-05-15 at 18:35 -0700, Eric W. Biederman wrote: > Vivek Goyal <vgoyal@...hat.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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