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Date: Thu, 24 Jun 2010 13:25:42 +0300
From: Jaakko Heinonen <jh@FreeBSD.org>
To: ben wilber <ben@desync.com>
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Cc: freebsd-current <freebsd-current@freebsd.org>, d@delphij.net
Subject: Re: zfs panic
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On 2010-06-23, ben wilber wrote:
> > > panic: _sx_xlock_hard: recursed on non-recursive sx buf_hash_table.ht_locks[i].ht_lock @ /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/c
> > > ommon/fs/zfs/arc.c:1626
> > 
> > Any chance to obtain a backtrace for the panic?
> 
> >From r209229:
> 
> db:0:kdb.enter.default>  bt
> Tracing pid 3233 tid 100396 td 0xffffff013600f000
> kdb_enter() at kdb_enter+0x3d
> panic() at panic+0x1c8
> _sx_xlock_hard() at _sx_xlock_hard+0x93
> _sx_xlock() at _sx_xlock+0xaa
> arc_buf_remove_ref() at arc_buf_remove_ref+0x7b
> dbuf_rele() at dbuf_rele+0x15d
> zfs_freebsd_reclaim() at zfs_freebsd_reclaim+0xe1
> VOP_RECLAIM_APV() at VOP_RECLAIM_APV+0xe8
> vgonel() at vgonel+0x186
> vnlru_free() at vnlru_free+0x2f4
> vfs_lowmem() at vfs_lowmem+0x31

I believe that this has been fixed in r209260.

-- 
Jaakko