Mon, 09 Jun 2008 07:18:59 -0700
6711930: NUMA allocator: ParOld can create a hole less than minimal object size in the lgrp chunk
Summary: The fix takes care of three issues that can create a hole less a minimal object in the lgrp chunk
Reviewed-by: ysr, apetrusenko
1 /*
2 * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 // This class provides a method for block structured setting of the
26 // _is_gc_active state without requiring accessors in CollectedHeap
28 class IsGCActiveMark : public StackObj {
29 public:
30 IsGCActiveMark() {
31 CollectedHeap* heap = Universe::heap();
32 assert(!heap->is_gc_active(), "Not reentrant");
33 heap->_is_gc_active = true;
34 }
36 ~IsGCActiveMark() {
37 CollectedHeap* heap = Universe::heap();
38 assert(heap->is_gc_active(), "Sanity");
39 heap->_is_gc_active = false;
40 }
41 };