From 163cec32a74e823cb18892230825684bc95097cd Mon Sep 17 00:00:00 2001
From: Arian <arian.kulmer@web.de>
Date: Sun, 28 Aug 2022 17:15:32 +0200
Subject: [PATCH] Revert "sm8350-common: let init do read ahead configuration"

Init doesn't handle all dm devices

This reverts commit 17d09b70a03a4db2b0277d52a59495f637a016f4.

Change-Id: I2b42c286307e8fd41140bca8f893ccdf13ebfc06
---
 rootdir/bin/init.kernel.post_boot-lahaina.sh | 25 ++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/rootdir/bin/init.kernel.post_boot-lahaina.sh b/rootdir/bin/init.kernel.post_boot-lahaina.sh
index f784aaa..bec5716 100755
--- a/rootdir/bin/init.kernel.post_boot-lahaina.sh
+++ b/rootdir/bin/init.kernel.post_boot-lahaina.sh
@@ -77,6 +77,30 @@ function configure_zram_parameters() {
 	fi
 }
 
+function configure_read_ahead_kb_values() {
+	MemTotalStr=`cat /proc/meminfo | grep MemTotal`
+	MemTotal=${MemTotalStr:16:8}
+
+	dmpts=$(ls /sys/block/*/queue/read_ahead_kb | grep -e dm -e mmc)
+
+	# Set 128 for <= 3GB &
+	# set 512 for >= 4GB targets.
+	if [ $MemTotal -le 3145728 ]; then
+		ra_kb=128
+	else
+		ra_kb=512
+	fi
+	if [ -f /sys/block/mmcblk0/bdi/read_ahead_kb ]; then
+		echo $ra_kb > /sys/block/mmcblk0/bdi/read_ahead_kb
+	fi
+	if [ -f /sys/block/mmcblk0rpmb/bdi/read_ahead_kb ]; then
+		echo $ra_kb > /sys/block/mmcblk0rpmb/bdi/read_ahead_kb
+	fi
+	for dm in $dmpts; do
+		echo $ra_kb > $dm
+	done
+}
+
 function configure_memory_parameters() {
 	# Set Memory parameters.
 	#
@@ -98,6 +122,7 @@ function configure_memory_parameters() {
 	#
 
 	configure_zram_parameters
+	configure_read_ahead_kb_values
 	echo 0 > /proc/sys/vm/page-cluster
 	echo 100 > /proc/sys/vm/swappiness
 	echo 1 > /proc/sys/vm/watermark_scale_factor