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SubjectRe: [PATCH] - Increase MAX_APICS for large configs
On Thu, Apr 17, 2008 at 4:07 AM, Ingo Molnar <mingo@elte.hu> wrote:
>
> * Jack Steiner <steiner@sgi.com> wrote:
>
> > Increase the maximum number of apics when running very large
> > configurations. This patch has no affect on most systems.
>
> x86.git overnight random-qa testing found a boot crash and i bisected it
> down to this patch. The config is:
>
> http://redhat.com/~mingo/misc/config-Thu_Apr_17_10_17_14_CEST_2008.bad
>
> the failure is attached below. (I needed the exact boot parameters
> listed in that bootup log to see this failure.)
>
> it seems to be CONFIG_MAXSMP=y triggers the new more-apic-ids code and
> that causes some breakage elsewhere. [btw., this again shows how useful
> the CONFIG_MAXSMP debug feature is!]

so this one and Mike's 4096 NR_CPUS cause the problem?

2048 CPUs works.

YH


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