From a0a40883d0f4bdc0694b236353ad66a4b4ca92fa Mon Sep 17 00:00:00 2001
From: Rebecca Schultz Zavin <rebecca@android.com>
Date: Fri, 30 Oct 2009 18:39:55 -0700
Subject: Modify the binder to request 1M - 2 pages instead of 1M.  The backing
 store in the kernel requires a guard page, so 1M allocations fragment memory
 very badly.  Subtracting a couple of pages so that they fit in a power of two
 allows the kernel to make more efficient use of its virtual address space.

Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
---
 libs/binder/ProcessState.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'libs/binder/ProcessState.cpp')

diff --git a/libs/binder/ProcessState.cpp b/libs/binder/ProcessState.cpp
index d7daf734279e..2d4e10ddde53 100644
--- a/libs/binder/ProcessState.cpp
+++ b/libs/binder/ProcessState.cpp
@@ -41,7 +41,7 @@
 #include <sys/mman.h>
 #include <sys/stat.h>
 
-#define BINDER_VM_SIZE (1*1024*1024)
+#define BINDER_VM_SIZE ((1*1024*1024) - (4096 *2))
 
 static bool gSingleProcess = false;
 
-- 
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