lkml.org 
[lkml]   [2012]   [Sep]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] amd64_edac: Memory size reported double on processor family 0Fh
On 09/14/2012 07:55 AM, Josh Hunt wrote:
>
> Thanks to your help I was able to test your branch, but it still does
> not resolve the problem. Removal of the "factor=1" workaround fixes the
> memory size reporting on boot, but the sysfs values are still incorrect.
>

Please disregard what I said earlier about the shift still being wrong.
Looking at the dmesg more I see now that the # of pages are correctly
reported (262144), however sysfs is still wrong.

[ 25.837588] EDAC DEBUG: init_csrows: MC node: 0, csrow: 0
[ 25.837589] EDAC DEBUG: amd64_csrow_nr_pages: csrow: 0, channel: 0,
DBAM idx: 2
[ 25.837591] EDAC DEBUG: amd64_csrow_nr_pages: nr_pages/channel: 262144
[ 25.837592] EDAC amd64: CS0: Unbuffered DDR2 RAM
[ 25.837724] EDAC DEBUG: init_csrows: Total csrow0 pages: 262144
[ 25.837725] DBG: init_csrows: channel_count:2
[ 25.837856] DBG: init_csrows: channel_count:2
[ 25.837988] EDAC DEBUG: init_csrows: MC node: 0, csrow: 1
[ 25.837989] EDAC DEBUG: amd64_csrow_nr_pages: csrow: 1, channel: 0,
DBAM idx: 2
[ 25.837991] EDAC DEBUG: amd64_csrow_nr_pages: nr_pages/channel: 262144
[ 25.837992] EDAC amd64: CS1: Unbuffered DDR2 RAM
[ 25.838157] EDAC DEBUG: init_csrows: Total csrow1 pages: 262144
[ 25.838158] DBG: init_csrows: channel_count:2
[ 25.838289] DBG: init_csrows: channel_count:2
[ 25.838421] EDAC DEBUG: init_csrows: MC node: 0, csrow: 2
[ 25.838422] EDAC DEBUG: amd64_csrow_nr_pages: csrow: 2, channel: 0,
DBAM idx: 2
[ 25.838424] EDAC DEBUG: amd64_csrow_nr_pages: nr_pages/channel: 262144
[ 25.838425] EDAC amd64: CS2: Unbuffered DDR2 RAM
[ 25.838556] EDAC DEBUG: init_csrows: Total csrow2 pages: 262144
[ 25.838558] DBG: init_csrows: channel_count:2
[ 25.838689] DBG: init_csrows: channel_count:2
[ 25.838820] EDAC DEBUG: init_csrows: MC node: 0, csrow: 3
[ 25.838822] EDAC DEBUG: amd64_csrow_nr_pages: csrow: 3, channel: 0,
DBAM idx: 2
[ 25.838823] EDAC DEBUG: amd64_csrow_nr_pages: nr_pages/channel: 262144
[ 25.838824] EDAC amd64: CS3: Unbuffered DDR2 RAM
[ 25.838957] EDAC DEBUG: init_csrows: Total csrow3 pages: 262144

I looked into this and see that sysfs is doing the double counting b/c
it loops over the # of channels:

[ 131.423949] DBG: csrow_size_show: i:0 nr_pages:262144 nr_channels:2
[ 131.424112] DBG: csrow_size_show: i:1 nr_pages:524288 nr_channels:2

I verified this in init_csrows:
[ 25.838958] DBG: init_csrows: channel_count:2

Since I don't know the details of the hardware here it's hard for me to
suggest a fix, but it would seem that k8_early_channel_count() needs to
be modified to only return 1 in this case?

Josh





\
 
 \ /
  Last update: 2012-09-14 21:41    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site