Hi, A minor correction, include the vnode type just like ffs_read() does when it encounters an unsupported type and panics.
Comments? OK? Index: ffs_vnops.c =================================================================== RCS file: /cvs/src/sys/ufs/ffs/ffs_vnops.c,v retrieving revision 1.91 diff -u -p -r1.91 ffs_vnops.c --- ffs_vnops.c 2 Jul 2018 20:56:22 -0000 1.91 +++ ffs_vnops.c 11 Jul 2018 05:20:27 -0000 @@ -315,7 +315,7 @@ ffs_write(void *v) panic("ffs_write: nonsync dir write"); break; default: - panic("ffs_write: type"); + panic("ffs_write: type %d", vp->v_type); } fs = ip->i_fs;