Page fault, GEOM problem?? (also: using a ASUS A7N8X-XE/nForce2 utlra400?)

[Johan Ström]

On 23 jan 2006, at 20.01, Johan Ström wrote:

>
> On 23 jan 2006, at 14.15, Michael S. Eubanks wrote:
>
>> On Mon, 2006-01-23 at 10:24 +0100, Johan Ström wrote:
>>> On 23 jan 2006, at 09.53, Michael S. Eubanks wrote:
>>>
>>>> On Mon, 2006-01-23 at 06:43 +0100, Johan Ström wrote:
>>>>
>>>> Wish I could be of more help. :)  Have you tried to toggle the  
>>>> sysctl
>>>> dma flags?  I've seen similar posts in the past with read timeouts
>>>> caused from dma being enabled.
>>>>
>>>> # sysctl -a | grep dma
>>>> ...
>>>> hw.ata.ata_dma: 1      <=== Try turning this one off (1 ==> 0).
>>>> hw.ata.atapi_dma: 1
>>>> ...
>>>
>>> Disabling DMA, wouldnt that give me pretty bad performance?
>>>
>>>> -Michael
>>>>
>>
>> If it was not the problem, you could always change it back.  It  
>> *should*
>> be possible to simply set the control mode on those two disks (``man
>> rc.early'', ``man atacontrol'').  Unfortunately, the problem is  
>> noted as
>> errata in several FreeBSD versions tending to appear on SATA  
>> disks.  I
>> believe this is also a problem with some linux setups.  If you google
>> ``FreeBSD hw.ata.ata_dma RELEASE'' you will eventually find the
>> following page relating to Asus motherboards:
>>
>> http://www.ryxi.com/freebsd/63-668-write-dma-other-similar-errors- 
>> read.shtml
>>
>> I picked it out based on the following line in the dmesg output:
>>
>>> Nov 29 20:46:09 elfi kernel: ACPI APIC Table: <ASUS   A7V333  >
>>
>> I'd say it's worth a shot.  You might even try turning both the flags
>> off temporarily to see what you get.  Your guess is as good as  
>> mine.  :)
>>
>
> Okay, tried turning it of.. The disk IO speeds went even lower...  
> whoping 9-10MB/s and lots of load ;)
> And since the crashes comes randomly (haven't been able to  
> reproduce them "on deamon") i dont realy want to run it like this.. ;)
>
> I did another test. I moved the controller card and the disks to my  
> MSI K8N Neo motherboard (with AMD64 3200+ etc), and immediatly I  
> got write speeds of ~49MB/s:
>
>  $ dd if=/dev/zero of=bigfile.zero bs=1024 count=1000024
> 1024024576 bytes transferred in 21.974227 secs (46601164 bytes/sec)
>
> Compared to
> $ dd if=/dev/zero of=bigfile.zero bs=1024 count=1000024
> 1024024576 bytes transferred in 78.897708 secs (12979142 bytes/sec)
>
> All tests where done in
> /dev/mirror/gm0s1f on /usr (ufs, NFS exported, local, soft-updates,  
> acls)
>
> Soo.. I guess this mobo is just plain fucked and needs to be  
> replaced with something newer ;)
> Bad thing is, this is Socket A.. so there isnt so many choices left  
> in the mobo market..
>
> However, i found a ASUS A7N8X-XE NF ULTRA 400 SOCKET A with Nforce2  
> Ultra 400 chipset.. Does anyone have any knowledge about this chipset?
> How well does it work with Fbsd? I'll do some googling but if  
> someone is using this successfully or unsuccessfully, please let me  
> know :)

Got the board now, everything seems to work great, fine  
transferspeeds, no crashes so far (1 day..). Lets hope this thread  
ends here..:)

> --
> Johan