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8007074: SIGSEGV at ParMarkBitMap::verify_clear()

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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
This commit is contained in:
Stefan Karlsson 2013-08-16 13:22:32 +02:00
parent 6a548048a3
commit 7ade7987a0
20 changed files with 796 additions and 159 deletions
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4
hotspot/src/share/vm/runtime/os.hpp
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@ -328,8 +328,8 @@ class os: AllStatic {
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();