freebsd-dev/sys/fs/tmpfs
Alan Cox 6bbee8e28a Add a new option, OBJPR_NOTMAPPED, to vm_object_page_remove(). Passing this
option to vm_object_page_remove() asserts that the specified range of pages
is not mapped, or more precisely that none of these pages have any managed
mappings.  Thus, vm_object_page_remove() need not call pmap_remove_all() on
the pages.

This change not only saves time by eliminating pointless calls to
pmap_remove_all(), but it also eliminates an inconsistency in the use of
pmap_remove_all() versus related functions, like pmap_remove_write().  It
eliminates harmless but pointless calls to pmap_remove_all() that were being
performed on PG_UNMANAGED pages.

Update all of the existing assertions on pmap_remove_all() to reflect this
change.

Reviewed by:	kib
2011-06-29 16:40:41 +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 Eliminate two dubious attempts at optimizing the implementation of a 2011-02-22 14:47:10 +00:00
tmpfs_vnops.h Reflect license change of NetBSD code. 2008-09-03 18:53:48 +00:00
tmpfs.h Eliminate tn_reg.tn_aobj_pages. Instead, correctly maintain the vm 2011-02-13 14:46:39 +00:00