Re: [PATCH 6/8] SGI x86_64 UV: Limit the number of microcodemessages

From: Ingo Molnar
Date: Sun Oct 25 2009 - 13:28:31 EST



* Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote:

> On Sun, 25 Oct 2009 17:37:04 +0100
> Ingo Molnar <mingo@xxxxxxx> wrote:
>
> >
> > Having the precise microcode version printed (or exposed somewhere in
> > /sys) is useful - sometimes when there's a weird crash in some
> > prototype CPU one of the first questions from hw vendors is 'which
> > precise microcode version was that?'.
>
> something like /sys/devices/system/cpu/cpu0/microcode/version ?
>
> (yes that is there today ;-)

yeah, i used that for a bug recently.

Nevertheless it makes sense to print the boot CPU message too - for bugs
that crash before we can read out
/sys/devices/system/cpu/cpu0/microcode/version.

Ingo
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