Fri, 16 Aug 2013 13:22:32 +0200
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso
1 /*
2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. 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
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7 * published by the Free Software Foundation.
8 *
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * accompanied this code).
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25 #ifndef SHARE_VM_MEMORY_GENREMSET_INLINE_HPP
26 #define SHARE_VM_MEMORY_GENREMSET_INLINE_HPP
28 // Inline functions of GenRemSet, which de-virtualize this
29 // performance-critical call when when the rem set is the most common
30 // card-table kind.
32 void GenRemSet::write_ref_field_gc(void* field, oop new_val) {
33 if (kind() == CardTableModRef) {
34 ((CardTableRS*)this)->inline_write_ref_field_gc(field, new_val);
35 } else {
36 write_ref_field_gc_work(field, new_val);
37 }
38 }
40 #endif // SHARE_VM_MEMORY_GENREMSET_INLINE_HPP