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>
diff --git a/libs/binder/ProcessState.cpp b/libs/binder/ProcessState.cpp
index d7daf73..2d4e10d 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;