Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels on boot cpu

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To: Vivek Goyal <vgoyal@...>
Cc: Ben Woodard <woodard@...>, Andi Kleen <andi@...>, Neil Horman <nhorman@...>, <kexec@...>, <linux-kernel@...>, Andi Kleen <ak@...>, <hbabu@...>, Eric W. Biederman <ebiederm@...>
Date: Wednesday, November 28, 2007 - 12:02 pm

On Wed, Nov 28, 2007 at 10:36:49AM -0500, Vivek Goyal wrote:
Yes, but according to Bens last debug effort, the APIC printout regarding the
timer setup, indicates that ioapic_i8259.pin == -1, meaning that the 8259 is not
routed through the ioapic.  In those cases, disable_IO_APIC does not take us
through the path you reference above, and does not revert to virtual wire mode.
Instead, it simply disables legacy vector 0, which if I understand this
correctly, simply tells the ioapic to not handle timer interrupts, trusting that
the 8259 in the system will deliver that interrupt where it needs to be.  If the
8259 is wired to deliver timer interrupts to cpu0 only, then you get the problem
that we have, do you?

Regards
Neil


-- 
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 *Neil Horman
 *Software Engineer
 *Red Hat, Inc.
 *nhorman@redhat.com
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Messages in current thread:
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Tue Nov 27, 12:12 am)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Tue Nov 27, 9:28 am)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Tue Nov 27, 10:56 am)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Wed Nov 28, 12:02 pm)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Wed Nov 28, 1:36 pm)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Wed Nov 28, 3:42 pm)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Thu Nov 29, 10:54 pm)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Wed Nov 28, 7:27 pm)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Mon Dec 10, 9:08 pm)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Tue Dec 11, 12:48 am)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Tue Dec 11, 11:29 am)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Tue Dec 11, 2:46 pm)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Wed Dec 12, 3:43 pm)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Wed Dec 12, 5:32 pm)
Re: [PATCH] k8: Enable legacy irqs with extended cpu ids, Eric W. Biederman, (Wed Dec 12, 4:43 am)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Mon Dec 10, 9:17 pm)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Tue Nov 27, 11:30 am)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Tue Nov 27, 6:38 pm)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Tue Nov 27, 8:15 pm)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Tue Nov 27, 8:43 pm)
Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Tue Nov 27, 7:19 am)