LGE_JLEN
m_new = MCLGETL(NULL, M_DONTWAIT, LGE_JLEN);
m_new->m_len = m_new->m_pkthdr.len = LGE_JLEN;
#define LGE_RESID (LGE_JPAGESZ - (LGE_JLEN * LGE_JSLOTS) % LGE_JPAGESZ)
#define LGE_JMEM ((LGE_JLEN * LGE_JSLOTS) + LGE_RESID)