linux-kernel - Re: K8 ECC error with linux-2.6.32

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Date:	Mon, 14 Dec 2009 23:23:31 +0100
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	Johannes Hirte <johannes.hirte@....tu-ilmenau.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: K8 ECC error with linux-2.6.32

On Mon, Dec 14, 2009 at 02:26:45PM +0100, Johannes Hirte wrote:
>  Northbridge Error, node 0, core: -1
> K8 ECC error.
>  Northbridge Error, node 0, core: -1
> K8 ECC error.
>  Northbridge Error, node 0, core: -1
> K8 ECC error.
>  Northbridge Error, node 0, core: -1
> K8 ECC error.
>  Northbridge Error, node 0, core: -1
> K8 ECC error.
>  Northbridge Error, node 0, core: -1
> K8 ECC error.
>  Northbridge Error, node 0, core: -1
> K8 ECC error.
>  Northbridge Error, node 0, core: -1
> K8 ECC error.

Ok, let's see what kind of errors does your machine report. It looks
like benign GART TLB walk errors but let's verify that first. Can you
apply the following patchlet and re-trigger the problem:

--
diff --git a/drivers/edac/edac_mce_amd.c b/drivers/edac/edac_mce_amd.c
index 713ed7d..fc4a68e 100644
--- a/drivers/edac/edac_mce_amd.c
+++ b/drivers/edac/edac_mce_amd.c
@@ -311,9 +311,12 @@ void amd_decode_nb_mce(int node_id, struct err_regs *regs, int handle_errors)
 		if (regs->nbsh & K8_NBSH_ERR_CPU_VAL)
 			pr_cont(", core: %u\n", (u8)(regs->nbsh & 0xf));
 	} else {
-		pr_cont(", core: %d\n", ilog2((regs->nbsh & 0xf)));
+		pr_cont(", core: %d\n", fls(regs->nbsh & 0xf) - 1);
 	}
 
+	pr_err("%s: NBSL: 0x%08x, NBSL: 0x%08x\n",
+		__func__, regs->nbsl, regs->nbsh);
+
 
 	pr_emerg("%s.\n", EXT_ERR_MSG(xec));
 

Thanks.

-- 
Regards/Gruss,
    Boris.
--
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