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

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

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From: Eric W. Biederman <ebiederm@...>

To: Andi Kleen <ak@...>

Cc: Neil Horman <nhorman@...>, Yinghai Lu <yhlu.kernel@...>, Ben Woodard <woodard@...>, Neil Horman <nhorman@...>, <kexec@...>, <linux-kernel@...>, <hbabu@...>, Andi Kleen <andi@...>, <tglx@...>, <mingo@...>, <hpa@...>

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

Date: Wednesday, December 12, 2007 - 3:43 pm

Andi Kleen <ak@suse.de> writes:
quoted text>
> It could enable the extended APIC IDs but not use them? 

In which case complaining is still correct (the BIOS was out of sync),
enabling bit 17 is still correct and we are just in overkill mode.

quoted text> Anyways I haven't got docs on that NV bridge so I might be wrong.

This has everything to do with how AMD coherent hypertransport works and
little if anything to do with how the NV bridge operated.

Basically the NV bridge seems to be sending a standard hypertransport
x86 legacy interrupt packet (that doesn't have any target information)
and when that packet  hits the coherent hypertransport domain it isn't
being converted into whatever would send it to all cpus. 

.....

The real practical problem is if somehow the BIOS goofs up this way
and it then decides to ask us to boot on one of these cpus with
an extended apic id.  We will hang in calibrate_delay.  So far
this only seems to happen in the kdump case but in theory the BIOS
could be completely crazy.

Eric
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Messages in current thread:

[PATCH] kexec: force x86_64 arches to boot kdump kernels on ..., Neil Horman, (Mon Nov 26, 9:47 pm)

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..., Neil Horman, (Tue Nov 27, 9:13 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..., Andi Kleen, (Tue Nov 27, 9:45 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..., Ben Woodard, (Tue Nov 27, 2:41 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Tue Nov 27, 3:42 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Vivek Goyal, (Tue Nov 27, 4:00 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Andi Kleen, (Tue Nov 27, 6:24 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Ben Woodard, (Tue Nov 27, 7:24 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Vivek Goyal, (Wed Nov 28, 11:36 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..., Neil Horman, (Wed Nov 28, 2:16 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Vivek Goyal, (Wed Nov 28, 3:05 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..., Ben Woodard, (Thu Nov 29, 10:16 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..., Yinghai Lu, (Fri Nov 30, 4:59 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Vivek Goyal, (Fri Nov 30, 10:35 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Fri Nov 30, 10:32 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Wed Nov 28, 5:09 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..., Ben Woodard, (Thu Nov 29, 10:12 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Vivek Goyal, (Fri Nov 30, 10:42 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Fri Nov 30, 10:51 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Thu Dec 6, 5:39 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Vivek Goyal, (Thu Dec 6, 6:11 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Thu Dec 6, 8:33 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Yinghai Lu, (Fri Dec 7, 4:50 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Yinghai Lu, (Fri Dec 7, 5:22 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Fri Dec 7, 10:21 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Fri Dec 7, 2:36 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Fri Dec 7, 2:48 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Fri Dec 7, 1:58 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..., Neil Horman, (Mon Dec 10, 11:43 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..., Neil Horman, (Tue Dec 11, 10:39 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..., Neil Horman, (Tue Dec 11, 2:22 pm)

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..., Neil Horman, (Tue Dec 11, 3:24 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Yinghai Lu, (Tue Dec 11, 3:51 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Tue Dec 11, 4:59 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Andi Kleen, (Wed Dec 12, 10:21 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Wed Dec 12, 11:55 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Andi Kleen, (Wed Dec 12, 12:07 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..., Neil Horman, (Wed Dec 12, 4:22 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Wed Dec 12, 5:32 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Thu Dec 13, 10:39 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Andi Kleen, (Thu Dec 13, 11:16 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Thu Dec 13, 11:32 am)

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..., Ben Woodard, (Tue Dec 11, 8:16 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Tue Dec 11, 8:52 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Yinghai Lu, (Tue Dec 11, 9:07 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Yinghai Lu, (Tue Dec 11, 2:00 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Tue Dec 11, 2:29 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Yinghai Lu, (Tue Dec 11, 2:45 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Yinghai Lu, (Tue Dec 11, 2:31 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Mon Dec 10, 11:39 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..., Vivek Goyal, (Mon Dec 10, 12:20 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., yhlu, (Fri Dec 7, 3:19 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Fri Dec 7, 4:13 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Thu Dec 6, 10:04 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Thu Dec 6, 8:10 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Vivek Goyal, (Fri Dec 7, 10:39 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Fri Dec 7, 10:53 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Vivek Goyal, (Fri Dec 7, 11:16 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Fri Dec 7, 11:53 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Fri Dec 7, 2:46 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Andi Kleen, (Tue Nov 27, 7:56 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Tue Nov 27, 4:52 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Tue Nov 27, 11:34 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Tue Nov 27, 10:28 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Andi Kleen, (Tue Nov 27, 10:43 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Tue Nov 27, 10:48 am)

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..., Ben Woodard, (Tue Nov 27, 4:50 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Tue Nov 27, 5:05 pm)

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..., Ben Woodard, (Tue Nov 27, 7:15 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..., Neil Horman, (Tue Nov 27, 7:40 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..., Neil Horman, (Wed Nov 28, 11:54 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Tue Nov 27, 12:45 pm)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Andi Kleen, (Tue Nov 27, 11:24 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Tue Nov 27, 9:53 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Andi Kleen, (Tue Nov 27, 6:55 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Eric W. Biederman, (Tue Nov 27, 7:19 am)

Re: [PATCH] kexec: force x86_64 arches to boot kdump kernels..., Neil Horman, (Tue Nov 27, 9:28 am)

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