From 73becf745274ab5fe99615b1dbed67022102d08e Mon Sep 17 00:00:00 2001
From: Wei Wang <wvw@google.com>
Date: Wed, 17 May 2017 15:27:32 -0700
Subject: [PATCH] sm6150-common: Tune zram performance

-Switch to LZ4 for better overall performance
-Set max_comp_streams to num of cores since upstream also moves this to
percpu.
-Set page-cluster to 0 as the incremental cost of reading 1 page at a
time is negligible for zram

Bug: 38249616
Test: boot and run zram-perf showing better performance
Change-Id: I0b92b246d773db85aa03d033b2cecee54347cbd1
---
 rootdir/etc/fstab.zram     | 2 +-
 rootdir/etc/init.target.rc | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/rootdir/etc/fstab.zram b/rootdir/etc/fstab.zram
index c33cdbb..faf8e03 100644
--- a/rootdir/etc/fstab.zram
+++ b/rootdir/etc/fstab.zram
@@ -1,4 +1,4 @@
 # Android fstab file.
 
 #<src>                                                  <mnt_point>            <type>  <mnt_flags and options>                              <fs_mgr_flags>
-/dev/block/zram0                                        none                   swap    defaults                                             zramsize=1073741824
+/dev/block/zram0                                        none                   swap    defaults                                             zramsize=1073741824,max_comp_streams=8
diff --git a/rootdir/etc/init.target.rc b/rootdir/etc/init.target.rc
index 58c608f..464867f 100644
--- a/rootdir/etc/init.target.rc
+++ b/rootdir/etc/init.target.rc
@@ -53,6 +53,10 @@ on init
     write /sys/block/sde/queue/read_ahead_kb 2048
     write /sys/block/sde/queue/nr_requests 256
 
+    # ZRAM setup
+    write /sys/block/zram0/comp_algorithm lz4
+    write /proc/sys/vm/page-cluster 0
+
 on fs
     mount_all --early /vendor/etc/fstab.qcom