lkml.org 
[lkml]   [2012]   [Jun]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: AMD FX CPU bug, not fixed by latest microcode?
On Mon, Jun 11, 2012 at 11:49:05AM +0200, Borislav Petkov wrote:
> On Mon, Jun 11, 2012 at 10:43:18AM +0200, Borislav Petkov wrote:
> > On Sun, Jun 10, 2012 at 09:24:13PM +0200, Boszormenyi Zoltan wrote:
> > > I have an AMD FX-8120 boxed CPU in an ASUS M5A99X-EVO mainboard
> > > with 32GB DDR3/1600 memory, running Fedora 17, upgraded from 16.
> > > memtest86+ show no problems.
>
> Ohe other thing: if there's an option in the BIOS to disable the IOMMU,
> can you do that and try reproducing the issue with IOMMU disabled?

Maybe not related, but I had bad memory in my Intel Core-i5
based system some months ago which resulted in rare crashes,
usually manifested itself as g++ ICEs when compiling a
mid-sized C++ project -- compiling a kernel with make -p4 showed
no problem. Also memtest86+ didn't show the issue,
so I tried memtest86-4.0a which claims to find more errors
due to SMP support. An overnight run left me with a screen
full of garbage and a crashed memtest86-4.0. I replaced
the RAM anyway and the box was stable since then.

memtest86-4.0a is at
http://memtest86.com/

The page claims:
With a single CPU it is not possible to drive multi-channel memory
controllers at full speed making it impossible to detect some types of errors

Maybe someone knowledgable could comment if this is true.


Johannes


\
 
 \ /
  Last update: 2012-06-11 15:22    [from the cache]
©2003-2011 Jasper Spaans