File system panic on recent HEAD

[Matthew Dillon]

:Hi,
:
:one of my boxes building pkgsrc HEAD packages on DF HEAD crashed last
:night.  Seems like a panic related to the file system.  IIRC I saw the
:panic before (about 2-3 times), but I was to busy to report it :/
:
:Last system messages:
:
:[...]
:linux: syscall madvise is obsoleted or not implemented (pid=66339)
:linux: syscall madvise is obsoleted or not implemented (pid=66339)
:linux: syscall madvise is obsoleted or not implemented (pid=66339)
:linux: syscall madvise is obsoleted or not implemented (pid=66339)
:
:dev = #ad/0x1e130057, ino = 14540, fs = /build
:panic: ffs_vfree: freeing free inode
:mp_lock = 00000000; cpuid = 0
:boot() called on cpu#0
:
:syncing disks... Warning: vfsync_bp skipping dirty buffer
:0xc455phd0\240\^A\^F\M^Xr\M^^{\M-:4\M--\^E\^Bo\^TB\M^U.M\2409\M^N+\M-9\M-P\M-
:3\M^]{L\M-r9w\M-W\M^S\M-T\^Q\M^Z:\M^P'?\M-AM\^X\M-`\M^W}\M^_\^D\^YL7A\M-SM\M^\\^P\M^K\M^W\M-(?\M-}\M-z\M-@\M-<\M^]{w.\^UI\M-Z\^ZdG\M-7\
:M-"z\M-~\M-~\M-Y^\M^Kxa\M^^{0-\M^]\M-k\M^H-\M-S\^Q\M^Z\^V\M^P'?\M-AM\M-P\M-?}1-\M^]\M-k\M^H-\M-S\^Q\M^Z\^V\M^P'?\M-AM\M^X\M-?\M-,}4
:77 Warning: vfsync_bp skipping dirty buffer 0xc4554784
:76 Warning: vfsync_bp skipping dirty buffer 0xc4554784
:[...]
:
:Writing a core dump to disk failed, so I cannot provide more
:information.  The machine is running HEAD:
:
:DragonFly pc12909 1.13.0-DEVELOPMENT DragonFly 1.13.0-DEVELOPMENT #6:
:Mon May 19 10:35:40 CEST 2008
:root at pc12909:/usr/obj/usr/src/sys/PC12909  i386
:
:Regards
:
:	Matthias

    Matthias, did that partition (/build) at any point in the past fill up
    to 100% ?

    There is a bug in UFS that FreeBSD fixed but we haven't yet that can
    cause filesystem corruption to occur when the filesystem fills up to
    100% and runs out of space.

    In anycase, what I recommend is that you umount the partition and do
    another manual fsck of it, then be careful not to fill it up and see
    if the problem reoccurs.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>