DragonFly bugs List (threaded) for 2008-04
Re: Panic in a vkernel: getblk: vnode 0x669232e8 has no object!
Matthew Dillon wrote:
> :"/home/var.vkernel/memimg.000000" is not a core dump: File format not
> :recognized" guess not? (tried it with gdb not kgdb)
> Heh. No but you CAN gdb the live vkernel (assuming it dropped into
> db> it is still running).
> In anycase, don't bother going that far. There's definitely a bug
> here. The vnode is supposed to have a VM object associated with it
> and clearly there must be a path where that vnode can be instantiated
> without one.
> Can you by any chance reproduce the bug to test that this patch
> fixes the problem?
> Index: ufs_inode.c
> RCS file: /cvs/src/sys/vfs/ufs/ufs_inode.c,v
> retrieving revision 1.24
> diff -u -p -r1.24 ufs_inode.c
> --- ufs_inode.c 2 Jan 2008 22:42:37 -0000 1.24
> +++ ufs_inode.c 2 Apr 2008 05:51:41 -0000
> @@ -87,6 +87,8 @@ if (!ufs_getinoquota(ip))
> (void)ufs_chkiq(ip, -1, NOCRED, FORCE);
> /* Must have a VM object to truncate */
> + if (vp->v_object == NULL)
> + vinitvmio(vp, 0);
> error = ffs_truncate(vp, (off_t)0, 0, NOCRED);
> ip->i_rdev = 0;
> mode = ip->i_mode;
I'll try to reproduce it, but since this is the first time I got this panic ...
I'll see if it can be done