Opteron problens with 16GB memory

Sat May 21 04:14:17 PDT 2005

On Thursday, 19 May 2005 at 14:25:10 +0200, Martin Nilsson wrote:
> Are there any known problems with Opterons and more than 12GB memory?
>
> I'm running 5.4-STABLE on a Tyan K8WE, the box is stable with 12GB
> but I get internal compiler errors when building world with 16GB.
>
> Disks are on a MegaRAID 320-2e kontroller (PCI-express) could there
> be something wrong in the amr driver when having lots of memory.
>
> I remember having similar problems on a MSI board with lots of memory
> a couple of months ago.

Yes, that would have been me.  It wasn't as much, though.

On Thursday, 19 May 2005 at  9:51:17 -0700, Kris Kennaway wrote:
> On Thu, May 19, 2005 at 02:25:10PM +0200, Martin Nilsson wrote:
>> Are there any known problems with Opterons and more than 12GB memory?
>>
>> I'm running 5.4-STABLE on a Tyan K8WE, the box is stable with 12GB
>> but I get internal compiler errors when building world with 16GB.
>
> Check that the last set of memory is not bad, i.e. swap out a
> different 4GB.

In my case, the issue was electrical.  I had 8 GB of memory in 4
sticks, and any combination of 2 seemed to work fine.  But read on...

On Thursday, 19 May 2005 at 11:09:09 -0700, Steve Kargl wrote:
> On Thu, May 19, 2005 at 09:51:17AM -0700, Kris Kennaway wrote:
>> On Thu, May 19, 2005 at 02:25:10PM +0200, Martin Nilsson wrote:
>>> Are there any known problems with Opterons and more than 12GB memory?
>>>
>>> I'm running 5.4-STABLE on a Tyan K8WE, the box is stable with 12GB
>>> but I get internal compiler errors when building world with 16GB.
>>
>> Check that the last set of memory is not bad, i.e. swap out a
>> different 4GB.
>
> http://www.memtest.org/

Yes.  I ran memtest and discovered that even with only 4 GB I was
getting about 1 correctable error a second.  With smaller memory, the
machine worked fine, and the original memory (which I had borrowed
from Tim Stoakes, copied in the hope that he might have more insight)
works fine in a 4-way machine with a total of 16 GB.

Greg
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