[patch] reproducible athlon mce fix

From: Geoffrey Lee
Date: Sun Nov 02 2003 - 01:15:09 EST

Hi all,

After switching from 2.4.22 to 2.6.0-test9, I have received reproducible
MCE non-fatal error check messages in my kernel log. (For example, one
shows up right after my first scsi card init).

>From Dave Jones' patch here:


and another message here:


would seem to imply that Athlons don't like having their Bank 0 poked at,
though that's what non-fatal.c does. Would it be correct to make sure
that that non-fatal.c starts at bank 1, if it is an Athlon?

Dave, is the following patch correct? Booted and tested, no ill effects
so far ...

- g.
--- linux-2.6.0-test9/arch/i386/kernel/cpu/mcheck/non-fatal.c.orig 2003-11-02 13:31:43.000000000 +0800
+++ linux-2.6.0-test9/arch/i386/kernel/cpu/mcheck/non-fatal.c 2003-11-02 13:34:37.000000000 +0800
@@ -30,7 +30,11 @@
int i;

+ for (i=1; i<nr_mce_banks; i++) {
for (i=0; i<nr_mce_banks; i++) {
rdmsr (MSR_IA32_MC0_STATUS+i*4, low, high);

if (high & (1<<31)) {