[Lustre-discuss] sgpdd-survey provokes DID_BUS_BUSY on an SFA10K

Michael Kluge Michael.Kluge at tu-dresden.de
Fri Oct 22 06:53:01 PDT 2010


Hi Bernd,

> I'm sorry to hear that. Unfortunately, I really do not have the time to port 
> this version to your kernel version.

No worries. I don't expect this :)

> I remember that you use Debian. But I guess you are still using a SLES kernel 
> then? You could ask Suse about it, although I guess they only do care about 
> SP1 with 2.6.32-sles now. If you use Debian Lenny, the RHEL5 kernel should 
> work (and besides its name, it is internally more or less a 2.6.29 to 2.6.32 
> kernel). Later Debian and Ubuntu releases have a more recent udev, which 
> requires at least 2.6.27.

OK, if the 2.6.18 works like a charm, I'll give the 2.6.18-194 it a try.


Michael

> 
> You could also ask our support department, if they have any news for 2.6.27. 
> I'm in Lustre engineering and as we only support RHEL5 right now, I so far did 
> not care about other kernel versions too much.
> 
> If all doesn't help, you will need to set the queue depth to 1, but that will 
> also impose a big performance hit :(
> 
> 
> Cheers,
> Bernd
> 
> 
> On Friday, October 22, 2010, Michael Kluge wrote:
> > Hi Bernd,
> > 
> > I have found a RHEL-only release for this version. It does not compile
> > on a 2.6.27 kernel :( I actually don't want to go back to 2.6.18 just to
> > get a new driver.
> > 
> > 
> > Michael
> > 
> > Am Freitag, den 22.10.2010, 13:34 +0200 schrieb Bernd Schubert:
> > > On Friday, October 22, 2010, Michael Kluge wrote:
> > > > Hi list,
> > > > 
> > > > DID_BUS_BUSY means that the controller is unable to handle the SCSI
> > > > command and is basically asking the host to send it again later. I had
> > > > I think just one concurrent region and 32 threads running. What would
> > > > be the appropriate action in this case? Reducing the queue depth on
> > > > the HBA? We have Qlogic here, there is an option for the kernel module
> > > > for this.
> > > 
> > > I think you run into a known issue with the Q-Logic driver an the SFA10K.
> > > You will need at least qla2xxx version 8.03.01.06.05.06-k. And the
> > > optimal numbers of commands is likely to be 16 (with 4 OSS connected).
> > > 
> > > 
> > > Hope it helps,
> > > Bernd
> 
> 

-- 

Michael Kluge, M.Sc.

Technische Universität Dresden
Center for Information Services and
High Performance Computing (ZIH)
D-01062 Dresden
Germany

Contact:
Willersbau, Room A 208
Phone:  (+49) 351 463-34217
Fax:    (+49) 351 463-37773
e-mail: michael.kluge at tu-dresden.de
WWW:    http://www.tu-dresden.de/zih
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