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Date: Fri, 18 Jul 2008 11:14:22 +0200
From: Lothar Braun <lothar@lobraun.de>
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To: Attilio Rao <attilio@freebsd.org>
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Cc: freebsd-current@freebsd.org
Subject: Re: panic: __lockmgr_args: unknown lockmgr request 0x0
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Hi,

Attilio Rao wrote:
> 2008/7/17, Lothar Braun <lothar@lobraun.de>:

> can you try the following patch:
> http://www.freebsd.org/~attilio/xfs.diff

The patch makes the panic disappear. But there seems to be a deadlock 
instead. Every access on the partition does block. I did

mkfs.xfs /dev/ad8s4
mount -t xfs /dev/ad8s4 /home
mkdir /home/lothar
chown lothar:lothar /home/lothar -> blocks

dmesg says:

SGI XFS with large block numbers, tracing, no debug enabled
fsname '/dev/ad8s4' logname '' rtname ''
flags 0x200000 sunit 0 swidth 0 logbufs -1 logbufsize -1
xfs_setsize_buftarg NI 0xc692d420
XFS mounting filesystem /dev/ad8s4
Ending clean XFS mount for filesystem: /dev/ad8s4
xfs_iunpin: REC RECABLE ip 0xc6f89d38
xfs_iunpin: REC RECABLE ip 0xc6f8a000
xfs_iflush: ip 0xc6f89d38 i_ino 131


I'll recompile the kernel with INVARIANTS and WITNESS enabled in order 
to get more information about the problem.

Regards,
   Lothar