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Date:   Tue, 26 Mar 2019 16:55:11 +0100
From:   Borislav Petkov <>
To:     "Ghannam, Yazen" <>
Cc:     "" <>,
        "" <>
Subject: Re: [PATCH] EDAC/amd64: Use maximum channel count for the EDAC
 channel layer size

On Mon, Mar 25, 2019 at 08:33:30PM +0000, Ghannam, Yazen wrote:
> From: Yazen Ghannam <>
> The AMD64 EDAC module current hardcodes the EDAC channel layer size
> (count) to two. Future AMD systems may have more channels than this.
> Set the EDAC channel layer size equal to the maximum number of channels
> possible for the system. On Family 17h and later, this is set in the
> num_umcs variable. Older systems will continue to use two as the
> default.
> Signed-off-by: Yazen Ghannam <>
> ---
>  drivers/edac/amd64_edac.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)

Ok, whole pile here:

Please run it to check all is still good.



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