panic: ffs_blkfree: freeing free frag

[Terry Lambert]

Robert Watson wrote:
> On Mon, 5 May 2003, NAKAJI Hiroyuki wrote:
> > Sad news...
> >
> > Just after I posted this message, I got same panic again and lost some
> > files in my $HOME. :(
> 
> Could you boot to single user mode, manually fsck all of your file
> systems, and then try running your various load tests again?  Perhaps a
> free list problem persisted on disk after the fix left over from earlier
> operation with the bug...

FWIW, given the way this bug exhibits, this *WILL* happen;
once it's messed up, you *WILL* need a full fsck in single
user mode before it'll be usable again.  BG fsck *WILL NOT*
fix this (it only fixes overreferences, not underreferences).

-- Terry