alc 64ef3ee8e5 In FreeBSD 7.0 and beyond, pmap_growkernel() should pass VM_ALLOC_INTERRUPT
to vm_page_alloc() instead of VM_ALLOC_SYSTEM.  VM_ALLOC_SYSTEM was the
logical choice before FreeBSD 7.0 because VM_ALLOC_INTERRUPT could not
reclaim a cached page.  Simply put, there was no ordering between
VM_ALLOC_INTERRUPT and VM_ALLOC_SYSTEM as to which "dug deeper" into the
cache and free queues.  Now, there is; VM_ALLOC_INTERRUPT dominates
VM_ALLOC_SYSTEM.

While I'm here, teach pmap_growkernel() to request a prezeroed page.

MFC after:	1 week
2008-07-07 17:25:09 +00:00
..
2008-05-13 20:02:26 +00:00