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From: clemens fischer <ino-news@spotteswoode.dnsalias.org>
Date: Fri, 11 Apr 2008 12:01:05 +0200
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Subject: Re: on shutdown: "panic: fifo_close: no v_fifoinfo"
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On Mon, 24 Mar 2008 13:13:29 +0100 clemens fischer wrote:

> i'm seeing this panic sometimes when shutting down the system, after
> many (but not all) of the disk buffers have been flushed.
> 
> ...
> Syncing disks, vnodes remaining...40 36 2 2 1 1 0 0 0 done
> All buffers synced.
> lock order reversal:
> 1st 0xc3ab97d4 vfslock (vfslock) @ /usr/src/sys/kern/vfs_mount.c:1249
> 2nd 0xc3d30e08 syncer (syncer) @ /usr/src/sys/kern/vfs_subr.c:2162
> ...
> panic: fifo_close: no v_fifoinfo
> cpuid = 0
> KDB: enter: panic
> exclusive lockmgr ufs r = 0 (0xc4090058) locked @ /usr/src/sys/kern/vfs_subr.c:2367
> exclusive lockmgr vfslock r = 0 (0xc3c0329c) locked @ /usr/src/sys/kern/vfs_mount.c:1249
> exclusive lockmgr ufs r = 0 (0xc39432a0) locked @ /usr/src/sys/kern/vfs_mount.c:1214
> exclusive sleep mutex Giant r = 0 (0xc081dc10) locked @ /usr/src/sys/kern/kern_shutdown.c:171

i don't know what you guys did, but sometime between 2008-04-07 and
2008-04-04 you fixed it. no panics anymore, most of the LORs disappeared
and the machine doesn't wait a minute or two on shutdown before powering
off anymore.


clemens