From 0e56d120fdd21daefdf0a1ea18da7e745a08af73 Mon Sep 17 00:00:00 2001
From: iveresov <unknown>
Date: Tue, 6 Sep 2011 21:03:51 -0700
Subject: [PATCH] 7087583: Hotspot fails to allocate heap with
 mmap(MAP_HUGETLB) Summary: Try using small pages when transparent huge pages
 allocation fails Reviewed-by: ysr

---
 src/os/linux/vm/os_linux.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/os/linux/vm/os_linux.cpp b/src/os/linux/vm/os_linux.cpp
index 3b0996a98..f1e6f1597 100644
--- a/src/os/linux/vm/os_linux.cpp
+++ b/src/os/linux/vm/os_linux.cpp
@@ -2531,10 +2531,14 @@ bool os::commit_memory(char* addr, size_t size, size_t alignment_hint,
       }
       return true;
     }
-    return false;
+    // Fall through and try to use small pages
   }
 
-  return commit_memory(addr, size, exec);
+  if (commit_memory(addr, size, exec)) {
+    realign_memory(addr, size, alignment_hint);
+    return true;
+  }
+  return false;
 }
 
 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
-- 
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