Date: Wed, 31 Jul 2013 16:40:01 GMT From: "Christopher D. Harrison" <harrison@biostat.wisc.edu> To: freebsd-fs@FreeBSD.org Subject: Re: kern/177536: [zfs] zfs livelock (deadlock) with high write-to-disk load Message-ID: <201307311640.r6VGe1BT028177@freefall.freebsd.org>
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The following reply was made to PR kern/177536; it has been noted by GNATS.
From: "Christopher D. Harrison" <harrison@biostat.wisc.edu>
To: bug-followup@FreeBSD.org, Martin.Birgmeier@aon.at
Cc:
Subject: Re: kern/177536: [zfs] zfs livelock (deadlock) with high write-to-disk
load
Date: Wed, 31 Jul 2013 11:36:26 -0500
I have also been hitting this bug with 9.1-RELEASE. My debugging has
got me to the point where I am almost certain the problem is in the MPS
driver in 9.1-RELEASE. 9.0-RELEASE would not deadlock under high I/O
but 9.1-RELEASE running the mps driver seems too.
Martin:
What device are your drives connected too? Is it an LSI HBA?
My device is:
mps0@pci0:5:0:0: class=0x010700 card=0x30c01000 chip=0x00641000
rev=0x02 hdr=0x00
vendor = 'LSI Logic / Symbios Logic'
device = 'SAS2116 PCI-Express Fusion-MPT SAS-2 [Meteor]'
class = mass storage
subclass = SAS
igb2@pci0:4:0:0: class=0x020000 card=0x10c915d9 chip=0x10c98086
rev=0x01 hdr=0x00
I have 6 systems in production which experience this deadlock issue.
The deadlock appears most frequently under high load but I have
experienced it on systems which are idle too.
-C
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