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SubjectRe: [PATCH] Fix Athlon MCA

I'm seeing this message too on all my athlons, also if it seems harmless.
Will try this patch tomorrow.

bests

Luigi

On Sun, 21 Sep 2003, Kronos wrote:

> Date: Sun, 21 Sep 2003 16:39:34 +0200
> From: Kronos <kronos@kronoz.cjb.net>
> To: davej@codemonkey.org.uk
> Cc: linux-kernel@vger.kernel.org
> Subject: [PATCH] Fix Athlon MCA
>
> Hi,
> on boot I'm seeing a lot of messages like this:
>
> MCE: The hardware reports a non fatal, correctable incident occurred on CPU 0.
> Bank 0: d47fa0000000bfee
>
> This messages go away if I revert cset 1.1119.9.1. AFAIK you were trying
> to decrease the logging level. After reading IA32 Architecture Software
> Developers Manual, vol3 - chapter 14.5 "Machine-Check Initialization" I
> think that the right way to do it is this:
>
> --- linux-2.6/arch/i386/kernel/cpu/mcheck/k7.c~ Sat Aug 9 06:37:27 2003
> +++ linux-2.6/arch/i386/kernel/cpu/mcheck/k7.c Sun Sep 21 00:36:39 2003
> @@ -81,8 +81,9 @@
> wrmsr (MSR_IA32_MCG_CTL, 0xffffffff, 0xffffffff);
> nr_mce_banks = l & 0xff;
>
> - for (i=1; i<nr_mce_banks; i++) {
> - wrmsr (MSR_IA32_MC0_CTL+4*i, 0xffffffff, 0xffffffff);
> + for (i=0; i<nr_mce_banks; i++) {
> + if (i)
> + wrmsr (MSR_IA32_MC0_CTL+4*i, 0xffffffff, 0xffffffff);
> wrmsr (MSR_IA32_MC0_STATUS+4*i, 0x0, 0x0);
> }
>
>
> We really want to clean all MC*_STATUS. I'm currently running linux 2.6.0-t5
> + this patch and I don't see the MCE messages on boot anymore.
>
> Luca
> --
> Reply-To: kronos@kronoz.cjb.net
> Home: http://kronoz.cjb.net
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