[dm-devel] dm-mpath-rdac.patch problem

[Chandra Seetharaman]

On Thu, 2007-07-12 at 18:35 -0700, Brian De Wolf wrote:
> Hello All,
> 
> I'm not sure if this is the right place for this, but it seems to be the only
> mailing list related to dm, multipath, and rdac, as far as I can tell.  I've
> been trying out the dm-mpath-rdac patch (both yesterday's and previous) with
> gentoo's unstable 2.6.22 kernel, on a Sun x4100 through a QLA2422 HBA (firmware
> ql2400_fw.bin.4.00.27) to an IBM DS4000.  I am using a version of
> multipath-tools that I got with git a few days ago.
> 
> I've got multipath working, it reports the hwhandler correctly ([hwhandler=1
> rdac]), and the volume is mountable, etc.  It also shows one link as active, the
> other as ghost.  However, once the active link dies, the volume becomes read
> only, and both connections are listed as failed.  Most importantly, something
> like this shows up in the logs:
> 
> Jul 12 17:11:15 jimbo kernel: device-mapper: multipath rdac: queueing
> MODE_SELECT command on 8:32

It does look like the rdac hardware handler is doing the right thing and
the qlogic is dying for some reason.

I have tested this code in both RHEL5 and SLES10 environments (qla23xx)
and they work fine. Can you try in one of those and see if it is any
different.

Just an FYI w.r.t multipath tools: please remove the patch
http://git.kernel.org/?p=linux/storage/multipath-
tools/.git;a=commit;h=e1e1a1bfb2cf76bfd1a49335e3deec5360fb09db from your
tree for the tools to calculate the path priorities properly.


> Jul 12 17:11:15 jimbo kernel: qla2xxx 0000:02:01.1: ISP System Error - mbx1=0h
> mbx2=8012h mbx3=8002h.
> Jul 12 17:11:15 jimbo kernel: qla2xxx 0000:02:01.1: Firmware has been previously
> dumped (ffffc2000171d000) -- ignoring request...
> Jul 12 17:11:16 jimbo kernel: qla2xxx 0000:02:01.1: Performing ISP error
> recovery - ha= ffff81007e85c530.
> Jul 12 17:11:16 jimbo kernel: device-mapper: multipath: Failing path 8:32.
> Jul 12 17:11:16 jimbo kernel: Buffer I/O error on device dm-6, logical block 0
> Jul 12 17:11:16 jimbo kernel: Buffer I/O error on device dm-6, logical block 1
> Jul 12 17:11:16 jimbo kernel: Buffer I/O error on device dm-6, logical block 2
> Jul 12 17:11:16 jimbo kernel: Buffer I/O error on device dm-6, logical block 3
> Jul 12 17:11:16 jimbo kernel: Buffer I/O error on device dm-6, logical block 0
> Jul 12 17:11:16 jimbo multipathd: 8:32: mark as failed
> Jul 12 17:11:16 jimbo multipathd: test: remaining active paths: 0
> 
> While this may be something for the maintainer of the qla2xxx module (I can't
> figure out where I'd send it, in that case...) I think it may be of interest
> that the dm_rdac module tries to push something over the HBA that causes it to
> bail completely and start from scratch (it starts init processes and loading
> firmware again).
> 
> Not to say that I'm not interested in any help getting this working, that is.
> If you have any suggestions on how to get this working, I'd love to hear them.
> I'm also willing to guinea pig some testing if you need it (This box still has a
> bit before it will have to be put in use).  I may use redhat to ensure that it's
> not just a broken HBA, but for the long run we would like it to join our gentoo
> environment.
> 
> Thanks!
> Brian De Wolf
> 
> PS- If the subject mislead you because you feel that this is just a qla2xxx
> problem, I'm sorry for wasting your time.
> 
> --
> dm-devel mailing list
> dm-devel at redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
-- 

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    Chandra Seetharaman               | Be careful what you choose....
              - sekharan at us.ibm.com   |      .......you may get it.
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