M_CLCACHE
m->m_flags &= (M_EXT | M_EXT_CLUSTER | M_CLCACHE | M_PHCACHE);
switch (m->m_flags & (M_CLCACHE | M_EXT | M_EXT_CLUSTER)) {
case M_CLCACHE | M_EXT | M_EXT_CLUSTER:
m->m_flags |= M_CLCACHE;
m->m_flags |= M_CLCACHE;
m->m_flags |= M_CLCACHE;
m->m_flags |= M_CLCACHE;