Bugzilla Bug 214883

With gentoo-sources-2.6.24-r3, there are troubles with qla2xxx module. 4G FC
arrays (Infortrend) are not working properly, while 2G FC are OK. 

Detecting 4G array gives:
 sd 8:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
 sd 8:0:0:0: [sdc] 44918798336 512-byte hardware sectors (22998425 MB)
 sd 8:0:0:0: [sdc] Write Protect is off
 sd 8:0:0:0: [sdc] Mode Sense: 8f 00 00 08
 sd 8:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support
DPO or FUA
 sd 8:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
 sd 8:0:0:0: [sdc] 44918798336 512-byte hardware sectors (22998425 MB)
 sd 8:0:0:0: [sdc] Write Protect is off
 sd 8:0:0:0: [sdc] Mode Sense: 8f 00 00 08
 sd 8:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support
DPO or FUA
 sdc: sdc1
 sd 8:0:0:0: [sdc] Attached SCSI disk

and later on, generated by vgscan:

 sd 8:0:0:0: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
 end_request: I/O error, dev sdc, sector 0
 sd 8:0:0:0: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
 end_request: I/O error, dev sdc, sector 44918798208
 sd 8:0:0:0: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
 end_request: I/O error, dev sdc, sector 44918798320
 sd 8:0:0:0: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
 end_request: I/O error, dev sdc, sector 0
 sd 8:0:0:0: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
 end_request: I/O error, dev sdc, sector 8
 sd 8:0:0:0: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
 end_request: I/O error, dev sdc, sector 0
 sd 8:0:0:0: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
 end_request: I/O error, dev sdc, sector 44918798114
 sd 8:0:0:0: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
 end_request: I/O error, dev sdc, sector 44918798282
 sd 8:0:0:0: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
 end_request: I/O error, dev sdc, sector 34
 sd 8:0:0:0: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
 end_request: I/O error, dev sdc, sector 42
 sd 8:0:0:0: [sdc] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
 end_request: I/O error, dev sdc, sector 34


gentoo-sources-2.6.23-r6 works fine. I am not sure whether this is a regression
in the driver or something else. The controller is
QLogic QLE220 - PCI-Express to 4Gb FC, Single Channel
ISP5432: PCIe (2.5Gb/s x4)
and firmware version is 4.02.02 (from sys-block/qla-fc-firmware-20071207)
On qlogic site there is a newer firmware (4.03.02), although I doubt the
firmware would be the cause of the problems.

Can you test with the latest development kernel which is
vanilla-sources-2.6.25_rc7 as of this writing.

Well, it is a production server, so I will try to find an empty slot in the
next couple of days.

I have tested today with vanilla-sources-2.6.25_rc8. Still the same problem.

Thanks for testing. Please report this upstream at http://bugzilla.kernel.org
and post the new bug URL here.

How easy is it to produce those errors? Does just running vgscan cause them?

Will do that. Yes, vgscan causes the error. Always reproducible.

The new URL for the bug:
http://bugzilla.kernel.org/show_bug.cgi?id=10486

Thanks.
Easily reproducible regressions like this are good candidates for bisection, if
you can afford the downtime.

http://www.reactivated.net/weblog/archives/2006/01/using-git-bisect-to-find-buggy-kernel-patches/

If you do have time to do that, please put results on the upstream bug.

The upstream bug was resolved today.

.

fixed in gentoo-sources-2.6.24-r7 and gentoo-sources-2.6.25-r2, thanks for your
help solving this