Konstantin Belousov 3407fefef6 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
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central
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conf	Change all the sample kernel configurations to use	2011-08-07 20:16:46 +00:00
ebus	Sync licenses and the corresponding RCS IDs with NetBSD, mainly switching	2011-03-12 14:33:32 +00:00
fhc	- Take advantage of the INTCLR_* macros.	2010-03-31 22:19:00 +00:00
include	Merge from r224217:	2011-07-20 18:51:18 +00:00
isa	Retire isa_setup_intr() and isa_teardown_intr() and use the generic bus	2011-05-06 13:48:53 +00:00
pci	- Current testing shows that (ab)using the JBC performance counter in bus	2011-07-12 17:56:42 +00:00
sbus	Since r221218 rman_manage_region(9) actually honors rm_start and rm_end	2011-08-28 11:49:53 +00:00
sparc64	Split the vm_page flags PG_WRITEABLE and PG_REFERENCED into atomic	2011-09-06 10:30:11 +00:00