In message <4FC7AFEB1135D41199260000F87A88260D9530@TRSBS>, Chris Williams write
s:
>
>Things seems to be working quite well, but there is one strange behavior which
> worries me; whenever I shut down, right after syncing I get a panic:
>
>panic: Vrele: negative ref cnt
I noticed this a while ago - it is due to inconsistent handling of
'rootvnode' in the kernel. You should find the details if you search
for 'rootvnode' in the -hackers archive.
The following patch should work around the panic by adding an extra
vnode reference for rootvp:
Ian
Index: init_main.c
===================================================================
RCS file: /FreeBSD/FreeBSD-CVS/src/sys/kern/init_main.c,v
retrieving revision 1.134.2.3
diff -u -r1.134.2.3 init_main.c
--- init_main.c 2000/09/07 19:13:36 1.134.2.3
+++ init_main.c 2001/02/02 16:01:52
@@ -456,6 +456,7 @@
VREF(fdp->fd_fd.fd_cdir);
VOP_UNLOCK(rootvnode, 0, &proc0);
fdp->fd_fd.fd_rdir = rootvnode;
+ VREF(fdp->fd_fd.fd_rdir);
}
SYSINIT(retrofit, SI_SUB_ROOT_FDTAB, SI_ORDER_FIRST, xxx_vfs_root_fdtab, NULL)
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