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xen-devel
Re: [Xen-devel] [PATCH 00/04] Kexec / Kdump: Release 20061122 (xen-unsta
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To: |
Magnus Damm <magnus.damm@xxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx> |
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Subject: |
Re: [Xen-devel] [PATCH 00/04] Kexec / Kdump: Release 20061122 (xen-unstable-12502) |
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From: |
Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
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Date: |
Wed, 29 Nov 2006 07:54:31 +0000 |
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Cc: |
Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>, Kazuo Moriwaka <moriwaka@xxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>, Isaku Yamahata <yamahata@xxxxxxxxxxxxx>, Magnus Damm <magnus@xxxxxxxxxxxxx>, Horms <horms@xxxxxxxxxxxx> |
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Tue, 28 Nov 2006 23:55:26 -0800 |
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[Xen-devel] [PATCH 00/04] Kexec / Kdump: Release 20061122 (xen-unstable-12502) |
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On 29/11/06 4:30 am, "Magnus Damm" <magnus.damm@xxxxxxxxx> wrote:
> In user space the kexec-tool then builds an elf header which points
> out where the notes are located in machine address space (using
> /proc/iomem). This header is then passed on to the secondary crash
> kernel which (for some reason) compacts all per-cpu PT_NOTE program
> headers into one which will be present in the final vmcore image. At
> this compacting stage we need to have data present for _all_ cpus, and
> the data for cpus that are not present should contain just zeros.
How does kexec discover how many cpus is 'all cpus'?
-- Keir
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