Bug#637085: [chad.dupuis@qlogic.com: RE: Broken qla2xxx in Debian Squeeze under load]
Forwarding a discussion we had with QLogic for information.
----- Forwarded message from Chad Dupuis <chad.dupuis@qlogic.com> -----
> From: Chad Dupuis <chad.dupuis@qlogic.com>
> To: Paul Elliott <paul.elliott@ynic.york.ac.uk>
> CC: Mark Hymers <Mark.Hymers@ynic.york.ac.uk>,
> Andrew Vasquez <andrew.vasquez@qlogic.com>
> Subject: RE: Broken qla2xxx in Debian Squeeze under load
> Accept-Language: en-US
> acceptlanguage: en-US
> X-OriginatorOrg: qlogic.com
>
> Hi Paul,
>
> We looked through the bug report and the UNDERRUN messages from our driver are actually benign. The messages simply mean that we didn't receive as much information as we expected for certain SCSI commands. In the case of the messages from the bug report, they were INQUIRY and MAINTENANCE IN SCSI commands which are known to have large buffers to make sure that there is enough room at the operating system side to hold all the response information. We actually removed these messages in newer kernels so as not to confuse people.
>
> I looked at the rest of the bug report and there wasn't anything directly relating the issue to the qla2xxx driver from the information provided. The OOPS messages actually point to the ext4 driver so the issue may be there.
>
> --Chad
>
> -----Original Message-----
> From: Paul Elliott [mailto:paul.elliott@ynic.york.ac.uk]
> Sent: Thursday, August 18, 2011 6:34 AM
> To: Linux Driver
> Cc: Mark Hymers
> Subject: Broken qla2xxx in Debian Squeeze under load
>
> Hello,
>
> We have recently invested in a new FC storage array to replace our existing infrastructure. We use HP servers/brocade switches and QLogic HBAs throughout.
>
> Unfortunately we have started to experience kernel BUGs and hard hangs when using the QLogic driver present in Debian Squeeze under very heavy load. We've reported the issue to the Debian bug tracker[1] but progress so far has been slow. The problem does *not* exist in later kernels and so we would like to track down the specific bug that affects the squeeze
> 2.6.32 kernel so that we can have the fix backported.
>
> Please could you take a moment to have a look at our bug report? I'm hoping it's something obvious as the issue is already fixed in later kernels..
>
> Thanks.
>
> [1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=637085
>
> --
> Paul Elliott, UNIX Systems Administrator York Neuroimaging Centre, University of York
>
>
>
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>
----- End forwarded message -----
--
Mark Hymers
York Neuroimaging Centre
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