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Date:      Tue, 8 Apr 2008 08:17:38 +0200
From:      =?ISO-8859-1?Q?Johan_Str=F6m?= <johan@headweb.com>
To:        freebsd-fs@freebsd.org, freebsd-stable@freebsd.org
Subject:   ZFS deadlock
Message-ID:  <0B67CBBD-11CB-44C2-807D-5F00654CDD35@headweb.com>

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Hello

A box of mine running RELENG_7_0 and ZFS over a couple of disks (6 =20
disks, 3 mirrors) seems to have gotten stuck. =46rom Ctrl-T:

load: 0.50  cmd: zsh 40188 [zfs:&buf_hash_table.ht_locks[i].ht_lock] =20
0.02u 0.04s 0% 3404k
load: 0.43  cmd: zsh 40188 [zfs:&buf_hash_table.ht_locks[i].ht_lock] =20
0.02u 0.04s 0% 3404k
load: 0.10  cmd: zsh 40188 [zfs:&buf_hash_table.ht_locks[i].ht_lock] =20
0.02u 0.04s 0% 3404k
load: 0.10  cmd: zsh 40188 [zfs:&buf_hash_table.ht_locks[i].ht_lock] =20
0.02u 0.04s 0% 3404k
load: 0.11  cmd: zsh 40188 [zfs:&buf_hash_table.ht_locks[i].ht_lock] =20
0.02u 0.04s 0% 3404k

Worked for a while then that stopped working too (was over ssh). When =20=

trying a local login i only got

load: 0.09  cmd: login 1611 [zfs] 0.00u 0.00s 0% 208k

I found one post like this earlier (by Xin LI), but nobody seemed to =20
have replied...
in my current conf, I think my kmem/kmem_max is at 512Mb (not sure =20
though, since I've edited my file yesterday for next reboot), with 2G =20=

of system RAM.. Normally I'd run kmem(max) 1G (with arcsize of 512M. =20
currently it is at default), but since I just got back to 2G total mem =20=

after some hardware problems I've been runnig at those lows (1G total =20=

is kindof tight with zfs..)

Well, just wanted to report... The box is not totally dead yet, ie I =20
can still do Ctrl-T on console, but thats it.. I don't really know =20
what more I can do so.. I don't have KDB/DDB.
I'll wait another hour or so before I hard reboot it, unless it =20
"unlocks" or if anyone have any suggestions.

Thanks

--
Johan Str=F6m
Stromnet
johan@stromnet.se
http://www.stromnet.se/





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