From cb0a5bcccbbd00955fe3196f5f6b638c541cf146 Mon Sep 17 00:00:00 2001
From: SamarV-121 <samarvispute121@gmail.com>
Date: Tue, 8 Sep 2020 15:53:16 +0000
Subject: [PATCH] universal7885: Enable ZRAM

Change-Id: Icd48749ad781ba48592fbcc2dc7c3ad88c659a57
Signed-off-by: SamarV-121 <samarvispute121@gmail.com>
---
 rootdir/Android.mk                | 8 ++++++++
 rootdir/etc/fstab.enableswap      | 1 +
 rootdir/etc/init.universal7904.rc | 7 +++++++
 sepolicy/private/file_contexts    | 2 ++
 universal7904-common.mk           | 3 ++-
 5 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 rootdir/etc/fstab.enableswap
 create mode 100644 sepolicy/private/file_contexts

diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index 154bfe0..6b87cee 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -7,3 +7,11 @@ LOCAL_MODULE_CLASS := ETC
 LOCAL_SRC_FILES    := etc/init.universal7904.rc
 LOCAL_MODULE_PATH  := $(TARGET_OUT_ETC)/init
 include $(BUILD_PREBUILT)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE       := fstab.enableswap
+LOCAL_MODULE_TAGS  := optional
+LOCAL_MODULE_CLASS := ETC
+LOCAL_SRC_FILES    := etc/fstab.enableswap
+LOCAL_MODULE_PATH  := $(TARGET_OUT_ETC)
+include $(BUILD_PREBUILT)
diff --git a/rootdir/etc/fstab.enableswap b/rootdir/etc/fstab.enableswap
new file mode 100644
index 0000000..a40c4d0
--- /dev/null
+++ b/rootdir/etc/fstab.enableswap
@@ -0,0 +1 @@
+/dev/block/zram0                                    none               swap        defaults                                              zramsize=2147483648,max_comp_streams=8
diff --git a/rootdir/etc/init.universal7904.rc b/rootdir/etc/init.universal7904.rc
index 7986093..f1f6323 100644
--- a/rootdir/etc/init.universal7904.rc
+++ b/rootdir/etc/init.universal7904.rc
@@ -4,6 +4,13 @@ on init
     # Disable vendor overlay
     mount none /vendor/lost+found /vendor/overlay bind
 
+    # ZRAM parameters
+    write /proc/sys/vm/page-cluster 0
+    write /proc/sys/vm/swappiness 100
+
+on fs
+    swapon_all /system/etc/fstab.enableswap
+
 service argos-daemon /system/bin/true
     oneshot
     disabled
diff --git a/sepolicy/private/file_contexts b/sepolicy/private/file_contexts
new file mode 100644
index 0000000..51fb163
--- /dev/null
+++ b/sepolicy/private/file_contexts
@@ -0,0 +1,2 @@
+# Block device for ZRAM
+/dev/block/zram0 u:object_r:swap_block_device:s0
diff --git a/universal7904-common.mk b/universal7904-common.mk
index 766400d..c7d9a42 100644
--- a/universal7904-common.mk
+++ b/universal7904-common.mk
@@ -19,7 +19,8 @@ TARGET_SCREEN_WIDTH := 1080
 
 # Init
 PRODUCT_PACKAGES += \
-    init.universal7904.rc
+    init.universal7904.rc \
+    fstab.enableswap
 
 # Net
 PRODUCT_PACKAGES += \