[Bug 14534] mvsas : repeatably disconnects all disks during RAID6 resync

[Bug 14534] mvsas : repeatably disconnects all disks during RAID6 resync

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https://bugzilla.kernel.org/show_bug.cgi?id=14534


Stonefish <iamthestonefishdammit@hotmail.com> changed:

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                 CC|                            |iamthestonefishdammit@hotma
                   |                            |il.com




--- Comment #11 from Stonefish <iamthestonefishdammit@hotmail.com>  2011-07-04 22:44:11 ---
Greetings all,

I'm receiving a very similar problem to this, and have been doing so ever since
I got three of those same Supermicro AOC-SASLP-MV8 cards six months back.  I'm
currently running just one, but that doesn't help.

I've created a software raid5, and it's usable.  When this error strikes, it
does recover.  IO performance drops to zero for about a minute or three, but it
does come back.  Almost always :)
I've tried several kernels since about 2.6.34, vanilla and gentoo alike. 
Currently on 2.6.39.2.

I was able to write some 140GB of random data to the array yesterday, and it
didn't fail until I started running a kvm instance and writing to the virtual
disk on it.  That kills it every time.
If I don't write large quantities of the data to the array, it remains quite
stable.  I'm able to read at excellent speeds.
The disks are Seagate ST31500341AS

I'll attach a log file.  Is there anything else anyone needs?

Cheers.

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[Bug 14534] mvsas : repeatably disconnects all disks during RAID6 resync

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--- Comment #12 from Stonefish <iamthestonefishdammit@hotmail.com>  2011-07-04 22:47:15 ---
Created an attachment (id=64642)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=64642)
/var/log/messages

That's the entire output of /var/log/messages from the time it fails.

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[Bug 14534] mvsas : repeatably disconnects all disks during RAID6 resync

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taeuber@bbaw.de changed:

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--- Comment #13 from taeuber@bbaw.de  2011-07-05 08:25:37 ---
Hello,

it seems my problem is also related to the mvsas driver/scsi subsystem:
http://thread.gmane.org/gmane.linux.kernel/1150608

I can reproduce the problem with a simple:
dd if=/dev/zero of=/dev/sdc

I tested this with the newest stable kernel 2.6.39.2 and two different
enterprise SATA drives:
* Seagate Constellation ES
* Hitachi Ultrastar 7k3000

I'd like to help debugging this.
Please give some instructions.

Lars

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--- Comment #14 from Stonefish <iamthestonefishdammit@hotmail.com>  2011-07-11 04:56:49 ---
Please note that I've updated to the latest firmware on the AOC-SASLP-MV8, and
it didn't help any.

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[Bug 14534] mvsas : repeatably disconnects all disks during RAID6 resync

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--- Comment #15 from taeuber@bbaw.de  2011-07-14 10:40:58 ---
Hi,

I've tested the newsest 3.0-rc7 version and still get the errors.
I'll attach the dmesg output.

The crash was provoked with:

# dd if=/dev/zero of=/dev/sdc

* ARECA ARC1300 SAS HBA with latest firmware
* Hitachi Ultrastar 7k3000 SATA disks
* 64 bit kernel
* mvsas driver

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[Bug 14534] mvsas : repeatably disconnects all disks during RAID6 resync

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--- Comment #16 from taeuber@bbaw.de  2011-07-14 10:43:05 ---
Created an attachment (id=65602)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=65602)
dmesg output

beginning of log is missing because of buffer size limitation

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[Bug 14534] mvsas : repeatably disconnects all disks during RAID6 resync

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Alan <alan@lxorguk.ukuu.org.uk> changed:

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                 CC|                            |alan@lxorguk.ukuu.org.uk
     Kernel Version|2.6.31.5                    |3.0-rc7




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[Bug 14534] mvsas : repeatably disconnects all disks during RAID6 resync

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Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |OBSOLETE

--- Comment #17 from Alan <alan@lxorguk.ukuu.org.uk> ---
This bug relates to a very old kernel. Closing as obsolete.

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[Bug 14534] mvsas : repeatably disconnects all disks during RAID6 resync

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--- Comment #10 from Arno Wagner <arno@wagner.name>  2009-11-14 11:03:55 ---
I did apply patches 1...6 to 2.6.32-rc7 successfully. Patch 7 applies but then
causes a compile error (looks like the same thing Christian found).

Function looks good. No issues on building the RAID6. No issues during fast
sequential reading or writing. No issues when compiling kernels in a loop. Hot
plugging works. Performance looks about right and is at roughly 1.5 times the
throughput of the slowest disk for sequential reading and writing.

I will do some more tests and if anything shows up, I will post it here.

Thanks for the quick fix, Andy!

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--- Comment #9 from quig48pak6ui <arno@wagner.name>  2009-11-14 05:01:40 ---
Just found the patches in the SCSI mailing list archives at 
http://marc.info. I am in the process of trying them out 
on a 4 disk RAID6 setup.

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Christian Vilhelm <christian.vilhelm@univ-lille2.fr> changed:

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                 CC|                            |christian.vilhelm@univ-lill
                   |                            |e2.fr




--- Comment #8 from Christian Vilhelm <christian.vilhelm@univ-lille2.fr>  2009-11-11 20:50:40 ---
I just tried the patches on 2.6.32-rc6, I did not apply the 7th patch as the
new libsas version is not in -rc6.
I could create a raid 5 array just fine on 6 SATA disks, using a 64xx based
card (Areca 1300). The raid-5 build was not possible without the patches (tried
many times with different configurations).
I will do some more tests in the coming days to confirm this.
Many thanks Andy for fixing this.

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[Bug 14534] mvsas : repeatably disconnects all disks during RAID6 resync

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--- Comment #7 from andy yan <ayan@marvell.com>  2009-11-11 01:14:53 ---
Are you in the SCSI mail list, if yes, you should have received it. OK, I will
forward it to you.

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--- Comment #6 from quig48pak6ui <arno@wagner.name>  2009-11-10 15:23:05 ---
Seems not to be in git yet, at least I cannot find it anywhere. Can you mail me
the patch directly and tell me what to apply it to?

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--- Comment #5 from andy yan <ayan@marvell.com>  2009-11-10 01:29:32 ---
I committed patch, please check it.

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--- Comment #4 from quig48pak6ui <arno@wagner.name>  2009-11-03 12:45:56 ---
I will give it a try when I have it.

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andy yan <ayan@marvell.com> changed:

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                 CC|                            |ayan@marvell.com




--- Comment #3 from andy yan <ayan@marvell.com>  2009-11-03 09:41:02 ---
I will commit a patch to update the mvsas code to latest version, this version
fixed some issue with disk IO.

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quig48pak6ui <arno@wagner.name> changed:

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--- Comment #2 from quig48pak6ui <arno@wagner.name>  2009-11-03 02:22:02 ---
Please send email to arno@wagner.name. I accidentially posted from the wrong
account and the forwarding for my old email seems not to work anymore.

Arno

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--- Comment #1 from Arno Wagner <wagner@tik.ee.ethz.ch>  2009-11-03 02:10:23 ---
Created an attachment (id=23625)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=23625)
kernel .config

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