vm_page_sleep_busy
vm_page_sleep_busy(m, FALSE, "ttmvmf");
vm_page_sleep_busy(m, FALSE, "execpg");
vm_page_sleep_busy(m, FALSE, "pgtblk");
vm_page_sleep_busy(m, FALSE, "vbpage");
vm_page_sleep_busy(p, TRUE, "pmaprl");
vm_page_sleep_busy(p, TRUE, "tpgmov");
vm_page_sleep_busy(fs->mary[0], TRUE, "vmpfw");
vm_page_sleep_busy(p, TRUE, "vpcwai");
vm_page_sleep_busy(m, TRUE, "madvpo");
vm_page_sleep_busy(p, TRUE, "vmopar");
vm_page_sleep_busy(p, TRUE, "vmotrm");
vm_page_sleep_busy(m, TRUE, "pgrbwt");
void vm_page_sleep_busy(vm_page_t m, int also_m_busy, const char *msg);