From 0f1811415f16ea315ab27900c692a7851f018600 Mon Sep 17 00:00:00 2001
From: Wei Wang <wvw@google.com>
Date: Thu, 26 Jul 2018 13:47:13 -0700
Subject: [PATCH] Set runtime readahead to 128KiB

Reduce readahead to 128KiB to reduce thrashing under memory pressure.

Bug: 110908295
Bug: 111855179
Test: Boot
Change-Id: I449d2733bc836ed7661653efb2400fc031a76644
(cherry picked from commit bed30a438faf4e9c4eabc51edf86ef1a97d00385)
---
 init-common.rc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/init-common.rc b/init-common.rc
index 356c9d8..0dcc3f0 100644
--- a/init-common.rc
+++ b/init-common.rc
@@ -10,11 +10,11 @@ on late-fs
 
 on property:sys.boot_completed=1
     # end boot time fs tune
-    write /sys/block/sda/queue/read_ahead_kb 1024
+    write /sys/block/sda/queue/read_ahead_kb 128
     write /sys/block/sda/queue/nr_requests 128
     write /sys/block/sda/queue/iostats 1
-    write /sys/block/dm-0/queue/read_ahead_kb 512
-    write /sys/block/dm-1/queue/read_ahead_kb 512
+    write /sys/block/dm-0/queue/read_ahead_kb 128
+    write /sys/block/dm-1/queue/read_ahead_kb 128
 
 on property:sys.boot_completed=1 && property:ro.build.type=user
     write /proc/sys/kernel/modules_disabled 1