diff --git a/projects/Allwinner/devices/H3/options b/projects/Allwinner/devices/H3/options
index 236844cb3f..f193528da5 100644
--- a/projects/Allwinner/devices/H3/options
+++ b/projects/Allwinner/devices/H3/options
@@ -51,3 +51,6 @@
 
   # set the addon project
     ADDON_PROJECT="ARMv7"
+
+  # additional kernel parameters
+    EXTRA_CMDLINE="$EXTRA_CMDLINE vmalloc=320M"
diff --git a/projects/Allwinner/devices/R40/options b/projects/Allwinner/devices/R40/options
index 0b2e10dbb4..979bb72b37 100644
--- a/projects/Allwinner/devices/R40/options
+++ b/projects/Allwinner/devices/R40/options
@@ -48,3 +48,6 @@
 
   # set the addon project
     ADDON_PROJECT="ARMv7"
+
+  # additional kernel parameters
+    EXTRA_CMDLINE="$EXTRA_CMDLINE vmalloc=320M"
diff --git a/projects/Allwinner/linux/linux.arm.conf b/projects/Allwinner/linux/linux.arm.conf
index ae0f7351ab..bb26fea8c7 100644
--- a/projects/Allwinner/linux/linux.arm.conf
+++ b/projects/Allwinner/linux/linux.arm.conf
@@ -5939,7 +5939,7 @@ CONFIG_DMA_CMA=y
 #
 # Default contiguous memory area size:
 #
-CONFIG_CMA_SIZE_MBYTES=256
+CONFIG_CMA_SIZE_MBYTES=320
 CONFIG_CMA_SIZE_SEL_MBYTES=y
 # CONFIG_CMA_SIZE_SEL_PERCENTAGE is not set
 # CONFIG_CMA_SIZE_SEL_MIN is not set