UVM_VNODE_RELKILL
uvn->u_flags |= UVM_VNODE_RELKILL;
while (uobj->uo_npages && uvn->u_flags & UVM_VNODE_RELKILL) {
if ((uvn->u_flags & UVM_VNODE_RELKILL) == 0) {
if (uvn->u_flags & UVM_VNODE_RELKILL)
uvn->u_flags &= ~UVM_VNODE_RELKILL; /* cancel RELKILL */
#define UVM_VNODE_BLOCKED (UVM_VNODE_DYING|UVM_VNODE_RELKILL)