6838842: NUMA allocator: Segfault during startup on Linux
Summary: Restored os::free_memory() semantics
Reviewed-by: apetrusenko
^build/
^dist/
^nbproject/private/
^src/share/tools/hsdis/build/
^src/share/tools/IdealGraphVisualizer/[a-zA-Z0-9]*/build/
^src/share/tools/IdealGraphVisualizer/build/
^src/share/tools/IdealGraphVisualizer/dist/