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Use atomic add and subtract to update the global wired page count,

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cnt.v_wire_count.
This commit is contained in:
Alan Cox 2003-01-05 01:31:45 +00:00
parent a3ebcd98e1
commit 6c4952c7b4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=108693
1 changed files with 3 additions and 3 deletions
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6
sys/vm/vm_page.c
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@ -863,7 +863,7 @@ vm_page_alloc(vm_object_t object, vm_pindex_t pindex, int req)
m->flags = PG_BUSY;
}
if (req & VM_ALLOC_WIRED) {
cnt.v_wire_count++;
atomic_add_int(&cnt.v_wire_count, 1);
m->wire_count = 1;
} else
m->wire_count = 0;
@ -1183,7 +1183,7 @@ vm_page_wire(vm_page_t m)
if (m->wire_count == 0) {
if ((m->flags & PG_UNMANAGED) == 0)
vm_pageq_remove(m);
cnt.v_wire_count++;
atomic_add_int(&cnt.v_wire_count, 1);
}
m->wire_count++;
KASSERT(m->wire_count != 0, ("vm_page_wire: wire_count overflow m=%p", m));
@ -1228,7 +1228,7 @@ vm_page_unwire(vm_page_t m, int activate)
if (m->wire_count > 0) {
m->wire_count--;
if (m->wire_count == 0) {
cnt.v_wire_count--;
atomic_subtract_int(&cnt.v_wire_count, 1);
if (m->flags & PG_UNMANAGED) {
;
} else if (activate)