mps0-troubles

[Joachim Tingvold]

On Fri, Jan 14, 2011, at 01:17:58AM GMT+01:00, Kenneth D. Merry wrote:
>> This won't "conflict" with what you've written here[1]? The 9211-8i
>> controller I have, use the SAS2008-chip.
>
> No, this affects the number of buffers available for scatter/gather
> entries.  Most commands will just have one physical memory buffer  
> attached,
> since system buffer memory is physically contiguous.
>
> It doesn't affect the number of commands the driver sends down to the
> chip.

I see.

The strange thing is that I copied around 7-8TB at around 105MB/s (via  
samba) to 'storage', without ever having this issue. There has been no  
hardware-change of any kind since this was done.

>> Would it be possible that low amounts of free memory (<100MB, the
>> system has a total of 4GB) could cause this? (since I'm using ZFS,
>> which relies heavily on memory).
>
> I don't think so.  If anything, I think that this is likely  
> triggered by
> a large number of outstanding commands, or perhaps a leak  
> somewhere.  If
> it's the former, hopefully this will fix it.  If it's the latter,  
> you'll
> eventually run into the problem again.

Okay. I've changed the value. I'll keep you posted.

-- 
Joachim