Don't always commit memory in VMAnonymousCache::Fault() for

overcommitting caches. If the page in question was just not mapped or
swapped out, we would increase the committment unnecessarily
(potentially even beyond the size of the cache).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27229 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/kernel/vm/VMAnonymousCache.cpp

@@ -697,7 +697,7 @@ VMAnonymousCache::WriteAsync(off_t offset, const iovec* vecs, size_t count,
 status_t
 VMAnonymousCache::Fault(struct vm_address_space *aspace, off_t offset)
 {
-	if (fCanOvercommit) {
+	if (fCanOvercommit && LookupPage(offset) == NULL && !HasPage(offset)) {
 		if (fGuardedSize > 0) {
 			uint32 guardOffset;