From 40863d55775a487fd75cfc80ad68030796351fa0 Mon Sep 17 00:00:00 2001
From: Minchan Kim <minchan@google.com>
Date: Mon, 14 Oct 2019 14:22:58 -0700
Subject: [PATCH] sdm710-common: Enable zram writeback job scheduler

Bug: 140882488
Change-Id: I5489a7ce7a8d73306a6ecf69f57d338b2b0eaad2
Signed-off-by: Minchan Kim <minchan@google.com>
Signed-off-by: Chenyang Zhong <zhongcy95@gmail.com>
---
 overlay/frameworks/base/core/res/res/values/config.xml | 3 +++
 product.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 5cfcba6..954180c 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -437,4 +437,7 @@
     <string name="db_default_journal_mode">MEMORY</string>
     <string name="db_default_sync_mode">OFF</string>
     <string name="db_wal_sync_mode">OFF</string>
+
+    <!-- Enable Zram writeback feature to allow unused pages in zram be written to flash. -->
+    <bool name="config_zramWriteback">true</bool>
 </resources>
diff --git a/product.prop b/product.prop
index 171c84a..5422afe 100644
--- a/product.prop
+++ b/product.prop
@@ -40,5 +40,10 @@ debug.sf.latch_unsignaled=1
 debug.sf.enable_hwc_vds=1
 ro.surface_flinger.max_frame_buffer_acquired_buffers=3
 
+# Zram
+ro.zram.mark_idle_delay_mins=60
+ro.zram.first_wb_delay_mins=1440
+ro.zram.periodic_wb_delay_hours=24
+
 # Zygote
 persist.device_config.runtime_native.usap_pool_enabled=true