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List:       freebsd-fs
Subject:    Re: Marvell 88SX6081 timeouts,
From:       Michael DeMan <freebsd () deman ! com>
Date:       2011-07-22 17:54:39
Message-ID: 0542453F-C96F-45D8-8697-4D181DFED03D () deman ! com
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Hi Jeremy,

Info is:

FreeBSD freenas.n.bli.openaccess.org 8.2-RELEASE-p2 FreeBSD 8.2-RELEASE-p2 #0: Tue \
Jul 12 12:11:37 PDT 2011     \
jpaetzel@servant.iXsystems.com:/b/home/jpaetzel/sf_freenas_build/obj.amd64/b/home/jpaetzel/sf_freenas_build/FreeBSD/src/sys/FREENAS.amd64 \
amd64


Also, the problem I am seeing with the mvs driver seems suspiciously close to a \
problem with ahci driver that is patched in 9-CURRENT apparently by disabling NCQ?

http://forums.freebsd.org/showthread.php?t=20412

The problem only occurs under high I/O - basically I can force it to occur by kicking \
off a zfs scrub while there is also about 300 IOPS of NFS traffic at the same time.



On Jul 20, 2011, at 9:40 PM, Jeremy Chadwick wrote:

> On Wed, Jul 20, 2011 at 08:59:32PM -0700, Michael DeMan wrote:
> > I've found a few posts around about this, but nothing conclusive.
> > 
> > We have been getting hit on this with two...
> > mvs0: <Marvell 88SX6081 SATA controller> port 0x9400-0x94ff mem \
> >                 0xfc400000-0xfc4fffff irq 28 at device 1.0 on pci1
> > mvs1: <Marvell 88SX6081 SATA controller> port 0x9800-0x98ff mem \
> >                 0xfc500000-0xfc5fffff irq 29 at device 3.0 on pci1
> > ...controllers.
> > 
> > I went through and did a few things (an older Opteron 285 box) and disabled \
> > super-pages and permutations on other device.hints, loader.conf and live sysctl \
> > settings -  all to no avail. 
> > I also found a few things via Google about being to patch from 9-CURRENT, but the \
> > idea with this box was to be able to re-purpose some older equipment for proof of \
> > concept using FreeNAS8. 
> > It is possible for me to build a version of that with the patches, etc - but I \
> > figured it would be better to post to the list first and gather feedback since \
> > this is pretty old/clunky hardware and newer patches may or may not solve the \
> > problem. 
> > Thanks,
> > 
> > - mike deman
> > 
> > 
> > 
> > Jul 19 16:46:41 freenas kernel: mvsch11: Timeout on slot 0
> > Jul 19 16:46:41 freenas kernel: mvsch11: iec 02000000 sstat 00000123 serr \
> >                 00000000 edma_s 00001023 dma_c 00000000 dma_s 00000000 rs \
> >                 00000201 status 40
> > Jul 19 16:46:41 freenas kernel: mvsch11:  ... waiting for slots 00000200
> > Jul 19 16:46:43 freenas kernel: mvsch4: Timeout on slot 4
> > Jul 19 16:46:43 freenas kernel: mvsch4: iec 02000000 sstat 00000123 serr 00000000 \
> >                 edma_s 00001022 dma_c 00000000 dma_s 00000000 rs 00000010 status \
> >                 40
> > Jul 19 16:46:45 freenas kernel: mvsch1: Timeout on slot 0
> > Jul 19 16:46:45 freenas kernel: mvsch1: iec 02000000 sstat 00000123 serr 00000000 \
> >                 edma_s 00001101 dma_c 00000000 dma_s 00000000 rs 00000001 status \
> >                 40
> > Jul 19 16:46:46 freenas kernel: mvsch11: Timeout on slot 9
> > Jul 19 16:46:46 freenas kernel: mvsch11: iec 02000000 sstat 00000123 serr \
> >                 00000000 edma_s 00001023 dma_c 00000000 dma_s 00000000 rs \
> >                 00000201 status 40
> > Jul 19 16:46:47 freenas root: ZFS: checksum mismatch, zpool=zpmir1 \
> > path=/dev/gpt/ada12 offset=52341838336 size=131072
> 
> You didn't disclose what FreeBSD version you're running and what your
> kernel/world build date is.  It matters greatly since it will then give
> us some idea what exact source revision you're using for the mvs(4)
> driver.  "uname -a" output is sufficient.
> 
> Thanks.
> 
> -- 
> > Jeremy Chadwick                                jdc at parodius.com |
> > Parodius Networking                       http://www.parodius.com/ |
> > UNIX Systems Administrator                   Mountain View, CA, US |
> > Making life hard for others since 1977.               PGP 4BD6C0CB |
> 

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