From 835a05445a3f8c875ee253f29162b430bac2da38 Mon Sep 17 00:00:00 2001
From: Randall Huang <huangrandall@google.com>
Date: Fri, 15 Mar 2019 17:23:50 +0800
Subject: [PATCH] sm6250-common: Enable ZRAM-writeback job

This patch enables zram-writeback job. It will run idle marking
at 60m since the device is boot. After that, it will do first
writeback after 3hour to sweep initiallized cold pages out.
After that, it periodically write out every 24hour.

Bug: 117682284
Bug: 127185055
Test: confirm with manual testing

Signed-off-by: Randall Huang <huangrandall@google.com>
Signed-off-by: Albert I <kras@raphielgang.org>
Change-Id: I6b8f537faf2ffff1a93170aad763f2be4dcaba42
---
 overlay/frameworks/base/core/res/res/values/config.xml | 3 +++
 vendor.prop                                            | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index 8e88534..1eb8f2d 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -289,6 +289,9 @@
          in hardware. -->
     <bool name="config_setColorTransformAccelerated">true</bool>
 
+    <!-- Enable Zram writeback feature to allow unused pages in zram be written to flash. -->
+    <bool name="config_zramWriteback">true</bool>
+
     <!-- List of biometric sensors on the device, in decreasing strength. Consumed by AuthService
          when registering authenticators with BiometricService. Format must be ID:Modality:Strength,
          where: IDs are unique per device, Modality as defined in BiometricAuthenticator.java,
diff --git a/vendor.prop b/vendor.prop
index 9b50095..b92cd89 100644
--- a/vendor.prop
+++ b/vendor.prop
@@ -201,3 +201,8 @@ ro.config.vc_call_vol_steps=10
 
 # WiFi
 wifi.aware.interface=wifi-aware0
+
+# ZRAM
+ro.zram.first_wb_delay_mins=180
+ro.zram.mark_idle_delay_mins=60
+ro.zram.periodic_wb_delay_hours=24