unkillable process

[Matthew Dillon]

:I have a gtkpod process running that is unkillable.  Neither -QUIT or
:-KILL help.  From top:
:
:71889 root     152   0 18064K 14112K vfs_bu   0:08  0.00%  0.00%
:gtkpod
:
:uname:
:
: DragonFly 1.7.0-DEVELOPMENT #6: Fri Oct  6 10:53:26 EDT 2006     
:
:Background:
:
:gtkpod successfully unmounted /ipod and then hung.  I cannot kill it.
:I believe vfs_bu in the STATE column of top may be a clue.  Ktrace
:returns a size 0 ktrace.out file.
:
:Thanks,
:Joe

    It is probably related to the /ipod unmounting operation.  The wait state
    "vfs_bu" is "vfs_busy", which occurs when the kernel needs to access
    a mount point during unmounting.  For some reason it is not being
    woken up.  It is probably a race between two processes but the only way
    I can tell for sure is if you can get a kernel core out of it.

					-Matt
					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>