d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

vm_map_madvise:

Browse Source 
Now that behaviors are stored in the vm_map_entry rather than
	the vm_object, it's no longer necessary to instantiate a vm_object
	just to hold the behavior.

Reviewed by:	dillon
This commit is contained in:
alc 1999-08-10 04:50:20 +00:00
parent 6118d3300f
commit 0524a59178
1 changed files with 3 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
sys/vm/vm_map.c
View File

@ -61,7 +61,7 @@
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $Id: vm_map.c,v 1.173 1999/07/21 18:02:27 alc Exp $
* $Id: vm_map.c,v 1.174 1999/08/01 06:05:08 alc Exp $
*/
/*
@ -1028,26 +1028,12 @@ vm_map_madvise(map, start, end, advise)
for(current = entry;
(current != &map->header) && (current->start < end);
current = current->next) {
vm_size_t size;
if (current->eflags & MAP_ENTRY_IS_SUB_MAP) {
continue;
}
vm_map_clip_end(map, current, end);
size = current->end - current->start;
/*
* Create an object if needed
*/
if (current->object.vm_object == NULL) {
vm_object_t object;
if ((advise == MADV_FREE) || (advise == MADV_DONTNEED))
continue;
object = vm_object_allocate(OBJT_DEFAULT, OFF_TO_IDX(size));
current->object.vm_object = object;
current->offset = 0;
}
switch (advise) {
case MADV_NORMAL:
@ -1069,7 +1055,7 @@ vm_map_madvise(map, start, end, advise)
vm_pindex_t pindex;
int count;
pindex = OFF_TO_IDX(current->offset);
count = OFF_TO_IDX(size);
count = OFF_TO_IDX(current->end - current->start);
/*
* MADV_DONTNEED removes the page from all
* pmaps, so pmap_remove is not necessary.
@ -1084,7 +1070,7 @@ vm_map_madvise(map, start, end, advise)
vm_pindex_t pindex;
int count;
pindex = OFF_TO_IDX(current->offset);
count = OFF_TO_IDX(size);
count = OFF_TO_IDX(current->end - current->start);
vm_object_madvise(current->object.vm_object,
pindex, count, advise);
pmap_object_init_pt(map->pmap, current->start,