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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tmpfs.h	Eliminate tn_reg.tn_aobj_pages. Instead, correctly maintain the vm	2011-02-13 14:46:39 +00:00
tmpfs_fifoops.c	Reflect license change of NetBSD code.	2008-09-03 18:53:48 +00:00
tmpfs_fifoops.h	Reflect license change of NetBSD code.	2008-09-03 18:53:48 +00:00
tmpfs_subr.c	Add a new option, OBJPR_NOTMAPPED, to vm_object_page_remove(). Passing this	2011-06-29 16:40:41 +00:00
tmpfs_vfsops.c	Add a lock flags argument to the VFS_FHTOVP() file system	2011-05-22 01:07:54 +00:00
tmpfs_vnops.c	Split the vm_page flags PG_WRITEABLE and PG_REFERENCED into atomic	2011-09-06 10:30:11 +00:00
tmpfs_vnops.h	Reflect license change of NetBSD code.	2008-09-03 18:53:48 +00:00