ZFS kernel panic

From: Pascal Hofstee <caelian_at_gmail.com>
Date: Tue, 28 Aug 2007 16:27:22 +0200
Hi,

For the last couple of weeks now I've occasionally been getting kernel
panics through ZFS (usually during heavy disk-i/o on the ZFS volume)
usually at the time this happened i was busy in X and therefore unable
to get to the console and force a kernel-dump. Today though it seems i
was lucky and actually managed to catch a kernel panic while in console
mode. Below is the actual panic message, i tried looking at the actual
backtrace but all the interesting frames are purely addresses without
any symbol information. I'll assume this is because of zfs and friends
being loaded as KLDs. Any information on how to provide a proper
backtrace including all symbols involved would be appreciated.

uname -a:
FreeBSD trinity.zion 7.0-CURRENT FreeBSD 7.0-CURRENT #29: Sun Aug 26
20:19:12 CEST 2007     pascal_at_trinity.zion:/usr/obj/usr/src/sys/TRINITY
i386

panic: ZFS: I/O failure (write on <unknown> off 0: zio 0xc66a9cf0 [L0
ZFS plain file] 20000L/20000P DVA[0]=<0:a126e0000:20000> fletcher2
uncompressed LE contiguous birth=7004722 fill=1
cksum=2dc0c354bd8ccc27:85745b74c1352a7f:72188a8646f7f624:28d89f21264ed4f2): e^
cpuid = 0
KDB: enter: panic
panic: from debugger
cpuid = 0
Uptime: 13h56m31s
Physical memory: 2027 MB
Dumping 292 MB: 277 261 245 229 213 197 181 165 149 133 117 101 85 69 53
37 21 5

-- 
Pascal Hofstee <caelian_at_gmail.com>
Received on Tue Aug 28 2007 - 12:55:00 UTC

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