freebsd-skq/sys/ia64
kib a9d505a22a Split the vm_page flags PG_WRITEABLE and PG_REFERENCED into atomic
flags field. Updates to the atomic flags are performed using the atomic
ops on the containing word, do not require any vm lock to be held, and
are non-blocking. The vm_page_aflag_set(9) and vm_page_aflag_clear(9)
functions are provided to modify afalgs.

Document the changes to flags field to only require the page lock.

Introduce vm_page_reference(9) function to provide a stable KPI and
KBI for filesystems like tmpfs and zfs which need to mark a page as
referenced.

Reviewed by:    alc, attilio
Tested by:      marius, flo (sparc64); andreast (powerpc, powerpc64)
Approved by:	re (bz)
2011-09-06 10:30:11 +00:00
..
acpica
compile
conf Enable NEW_PCIB by default on ia64. 2011-07-18 14:05:14 +00:00
disasm
ia32
ia64 Split the vm_page flags PG_WRITEABLE and PG_REFERENCED into atomic 2011-09-06 10:30:11 +00:00
include Bump MAXCPU for amd64, ia64 and XLP mips appropriately. 2011-07-19 13:00:30 +00:00
isa
pci