Mercurial > hg > truffle
diff src/os/bsd/vm/os_bsd.cpp @ 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 | 3a57fa7a4cd0 |
children | 40136aa2cdb1 e2722a66aba7 |
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--- a/src/os/bsd/vm/os_bsd.cpp Sun Aug 25 21:21:18 2013 -0400 +++ b/src/os/bsd/vm/os_bsd.cpp Fri Aug 16 13:22:32 2013 +0200 @@ -2325,7 +2325,9 @@ } -char* os::reserve_memory_special(size_t bytes, char* req_addr, bool exec) { +char* os::reserve_memory_special(size_t bytes, size_t alignment, char* req_addr, bool exec) { + fatal("This code is not used or maintained."); + // "exec" is passed in but not used. Creating the shared image for // the code cache doesn't have an SHM_X executable permission to check. assert(UseLargePages && UseSHM, "only for SHM large pages"); @@ -4752,3 +4754,8 @@ return n; } +#ifndef PRODUCT +void TestReserveMemorySpecial_test() { + // No tests available for this platform +} +#endif