kern/132960: [ufs] [panic] panic:ffs_blkfree: freeing free frag

[Lagrange Marc]

The following reply was made to PR kern/132960; it has been noted by GNATS.

From: Lagrange Marc <markocpc at gmail.com>
To: bug-followup at FreeBSD.org, kevinxlinuz at 163.com
Cc:  
Subject: Re: kern/132960: [ufs] [panic] panic:ffs_blkfree: freeing free frag
Date: Sat, 2 May 2009 09:58:29 +0200

 Hi,
 
 I think i've also the bug with panic: ffs_blkfree but my panic is :
 
 fsync: giving up on dirty
 0xc3ff3114: tag devfs, type VCHR
     usecount 1, writecount 0, refcount 771 mountedhere 0xc3fac300
     flags ()
     v_object 0xc1045600 ref 0 pages 3836
      lock type devfs: EXCL (count 1) by thread 0xc41a6690 (pid 1831)
   dev ad4s1f
 fsync: giving up on dirty
 0xc3ff3114: tag devfs, type VCHR
     usecount 1, writecount 0, refcount 771 mountedhere 0xc3fac300
     flags ()
     v_object 0xc1045600 ref 0 pages 3836
      lock type devfs: EXCL (count 1) by thread 0xc41a6690 (pid 1831)
   dev ad4s1f
 dev = ad4s1f, block = 1, fs = /usr
 panic: ffs_blkfree: freeing free block
 
 I've got this, two times i think when rebuilding the kernel, this is a
 FreeBSD 7.2-RELEASE installed last day in 7.2-RC2 and recompilled in
 7.2-RELEASE.
 I can't reproduce this bug for the moment...
 
 Is it related ? Any informations about this bug ?
 
 Thx.