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Introduce vm_map_pmap_enter(). Presently, this is a stub calling the MD

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pmap_object_init_pt().
This commit is contained in:
Alan Cox 2003-06-29 23:32:55 +00:00
parent c36507007f
commit 0551c08dee
2 changed files with 21 additions and 7 deletions
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26
sys/vm/vm_map.c
View File

@ -911,11 +911,9 @@ vm_map_insert(vm_map_t map, vm_object_t object, vm_ooffset_t offset,
#endif
if (cow & (MAP_PREFAULT|MAP_PREFAULT_PARTIAL)) {
mtx_lock(&Giant);
pmap_object_init_pt(map->pmap, start,
vm_map_pmap_enter(map, start,
object, OFF_TO_IDX(offset), end - start,
cow & MAP_PREFAULT_PARTIAL);
mtx_unlock(&Giant);
}
return (KERN_SUCCESS);
@ -1271,6 +1269,23 @@ vm_map_submap(
return (result);
}
/*
* vm_map_pmap_enter:
*
* Preload the mappings for the given object into the specified
* map. This eliminates the soft faults on process startup and
* immediately after an mmap(2).
*/
void
vm_map_pmap_enter(vm_map_t map, vm_offset_t addr,
vm_object_t object, vm_pindex_t pindex, vm_size_t size, int flags)
{
mtx_lock(&Giant);
pmap_object_init_pt(map->pmap, addr, object, pindex, size, flags);
mtx_unlock(&Giant);
}
/*
* vm_map_protect:
*
@ -1491,16 +1506,13 @@ vm_map_madvise(
vm_object_madvise(current->object.vm_object,
pindex, count, behav);
if (behav == MADV_WILLNEED) {
mtx_lock(&Giant);
pmap_object_init_pt(
map->pmap,
vm_map_pmap_enter(map,
useStart,
current->object.vm_object,
pindex,
(count << PAGE_SHIFT),
MAP_PREFAULT_MADVISE
);
mtx_unlock(&Giant);
}
}
vm_map_unlock_read(map);

2
sys/vm/vm_map.h
View File

@ -310,6 +310,8 @@ int vm_map_lookup (vm_map_t *, vm_offset_t, vm_prot_t, vm_map_entry_t *, vm_obje
void vm_map_lookup_done (vm_map_t, vm_map_entry_t);
boolean_t vm_map_lookup_entry (vm_map_t, vm_offset_t, vm_map_entry_t *);
int vm_map_clean (vm_map_t, vm_offset_t, vm_offset_t, boolean_t, boolean_t);
void vm_map_pmap_enter(vm_map_t map, vm_offset_t addr,
vm_object_t object, vm_pindex_t pindex, vm_size_t size, int flags);
int vm_map_protect (vm_map_t, vm_offset_t, vm_offset_t, vm_prot_t, boolean_t);
int vm_map_remove (vm_map_t, vm_offset_t, vm_offset_t);
void vm_map_startup (void);