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Add vm map and vm object locking to vmtotal().

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This commit is contained in:
Alan Cox 2003-01-03 05:52:02 +00:00
parent d616ee081f
commit 49247edca6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=108585
1 changed files with 14 additions and 5 deletions
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19
sys/vm/vm_meter.c
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@ -152,14 +152,19 @@ vmtotal(SYSCTL_HANDLER_ARGS)
* Note active objects.
*/
paging = 0;
for (map = &p->p_vmspace->vm_map, entry = map->header.next;
map = &p->p_vmspace->vm_map;
vm_map_lock_read(map);
for (entry = map->header.next;
entry != &map->header; entry = entry->next) {
if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) ||
entry->object.vm_object == NULL)
(object = entry->object.vm_object) == NULL)
continue;
vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE);
paging |= entry->object.vm_object->paging_in_progress;
vm_object_lock(object);
vm_object_set_flag(object, OBJ_ACTIVE);
paging |= object->paging_in_progress;
vm_object_unlock(object);
}
vm_map_unlock_read(map);
if (paging)
totalp->t_pw++;
}
@ -169,11 +174,14 @@ vmtotal(SYSCTL_HANDLER_ARGS)
*/
mtx_lock(&vm_object_list_mtx);
TAILQ_FOREACH(object, &vm_object_list, object_list) {
vm_object_lock(object);
/*
* devices, like /dev/mem, will badly skew our totals
*/
if (object->type == OBJT_DEVICE)
if (object->type == OBJT_DEVICE) {
vm_object_unlock(object);
continue;
}
totalp->t_vm += object->size;
totalp->t_rm += object->resident_page_count;
if (object->flags & OBJ_ACTIVE) {
@ -189,6 +197,7 @@ vmtotal(SYSCTL_HANDLER_ARGS)
totalp->t_armshr += object->resident_page_count;
}
}
vm_object_unlock(object);
}
mtx_unlock(&vm_object_list_mtx);
totalp->t_free = cnt.v_free_count + cnt.v_cache_count;