Re: [Xen-devel] [PATCH 00/04] Kexec / Kdump: Release 20061122 (xen-unstable-12502)

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

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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