From 423d6e846a9a0127d6d94825332a4bb8a1ba49d7 Mon Sep 17 00:00:00 2001
From: iveresov <unknown>
Date: Fri, 8 May 2009 15:20:10 -0700
Subject: [PATCH] 6838842: NUMA allocator: Segfault during startup on Linux
 Summary: Restored os::free_memory() semantics Reviewed-by: apetrusenko

---
 src/os/linux/vm/os_linux.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/os/linux/vm/os_linux.cpp b/src/os/linux/vm/os_linux.cpp
index b4705e4a7..63b3d6a43 100644
--- a/src/os/linux/vm/os_linux.cpp
+++ b/src/os/linux/vm/os_linux.cpp
@@ -2314,7 +2314,8 @@ bool os::commit_memory(char* addr, size_t size, size_t alignment_hint,
 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { }
 
 void os::free_memory(char *addr, size_t bytes) {
-  uncommit_memory(addr, bytes);
+  ::mmap(addr, bytes, PROT_READ | PROT_WRITE,
+         MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0);
 }
 
 void os::numa_make_global(char *addr, size_t bytes) {
-- 
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