diff --git a/releasetools/common.py b/releasetools/common.py
index c01d688..f409956 100644
--- a/releasetools/common.py
+++ b/releasetools/common.py
@@ -356,7 +356,7 @@ def SignFile(input_name, output_name, key, password, align=None,
   else:
     sign_name = output_name
 
-  cmd = ["java", "-Xmx2048m", "-jar",
+  cmd = ["java", "-Xmx1024m", "-jar",
            os.path.join(OPTIONS.search_path, "signapk.jar")]
   if whole_file:
     cmd.append("-w")
@@ -817,7 +817,7 @@ def worker():
 
 # map recovery.fstab's fs_types to mount/format "partition types"
 PARTITION_TYPES = { "yaffs2": "MTD", "mtd": "MTD",
-                    "ext4": "EMMC", "emmc": "EMMC", "vfat": "EMMC"}
+                    "ext4": "EMMC", "ext3": "EMMC", "emmc": "EMMC", "vfat": "EMMC"}
 
 def GetTypeAndDevice(mount_point, info):
   fstab = info["fstab"]