Mercurial > hg > graal-jvmci-8
diff src/share/vm/runtime/os.hpp @ 12110:4c84d351cca9
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
author | stefank |
---|---|
date | Fri, 16 Aug 2013 13:22:32 +0200 |
parents | af21010d1062 |
children | 62f527c674d2 d8e99408faad |
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--- a/src/share/vm/runtime/os.hpp Sun Aug 25 21:21:18 2013 -0400 +++ b/src/share/vm/runtime/os.hpp Fri Aug 16 13:22:32 2013 +0200 @@ -328,8 +328,8 @@ static char* non_memory_address_word(); // reserve, commit and pin the entire memory region - static char* reserve_memory_special(size_t size, char* addr = NULL, - bool executable = false); + static char* reserve_memory_special(size_t size, size_t alignment, + char* addr, bool executable); static bool release_memory_special(char* addr, size_t bytes); static void large_page_init(); static size_t large_page_size();