FreeBSD/sys/arm64/arm64/pmap.c
/*
 * We are in a serious low memory condition.  Resort to
 * drastic measures to free some pages so we can allocate
 * another pv entry chunk.
 *
 * Returns NULL if PV entries were reclaimed from the specified pmap.
 *
 * We do not, however, unmap 2mpages because subsequent accesses will
 * allocate per-page pv entries until repromotion occurs, thereby
 * exacerbating the shortage of free pv entries.
 */
We are in a serious low memory condition.  Resort to
drastic measures to free some pages so we can allocate
another pv entry chunk.

Returns NULL if PV entries were reclaimed from the specified pmap.

We do not, however, unmap 2mpages because subsequent accesses will
allocate per-page pv entries until repromotion occurs, thereby
exacerbating the shortage of free pv entries.
We are in a serious low memory condition . Resort to drastic measures to free some pages so we can allocate another pv entry chunk . Returns NULL if PV entries were reclaimed from the specified pmap . We do not however unmap 2mpages because subsequent accesses will allocate per - page pv entries until repromotion occurs thereby exacerbating the shortage of free pv entries .
static vm_page_t
reclaim_pv_chunk(pmap_t locked_pmap, struct rwlock **lockp)
{
	panic("ARM64TODO: reclaim_pv_chunk");
}
static vm_page_t reclaim_pv_chunk ( pmap_t locked_pmap , struct rwlock * * lockp ) { panic ( " " ) ; }
We are in a serious low memory condition.
We are in a serious low memory condition .