sm6150-common: rootdir: Set up read ahead values properly

* QCOM sets up for dm-0, dm-1 and dm-2 on boot via init.qcom.rc and for sda* via post boot script.
* Also set watermark_scale_factor and watermark_boost_factor basis QCOM recommendation.
* Reduce swappiness to 60.
* Modify configure_read_ahead_kb_values to set nr_requests value.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
Signed-off-by: therealmharc <therealmharc@gmail.com>

rootdir/bin/init.qcom.post_boot.sh

@@ -254,6 +254,35 @@ case "$soc_id" in
     ;;
 esac
 
+function configure_read_ahead_kb_values() {
+    MemTotalStr=`cat /proc/meminfo | grep MemTotal`
+    MemTotal=${MemTotalStr:16:8}
+
+    dmpts=$(ls /sys/block/*/queue | grep -e dm -e mmc)
+
+    # Set 128 for <= 3GB &
+    # set 512 for >= 4GB targets.
+    if [ $MemTotal -le 3145728 ]; then
+        echo 128 > /sys/block/mmcblk0/bdi/read_ahead_kb
+        echo 128 > /sys/block/mmcblk0/bdi/nr_requests
+        echo 128 > /sys/block/mmcblk0rpmb/bdi/read_ahead_kb
+        echo 128 > /sys/block/mmcblk0rpmb/bdi/nr_requests
+        for dm in $dmpts; do
+            echo 128 > $dm/read_ahead_kb
+            echo 128 > $dm/nr_requests
+        done
+    else
+        echo 512 > /sys/block/mmcblk0/bdi/read_ahead_kb
+        echo 256 > /sys/block/mmcblk0/bdi/nr_requests
+        echo 512 > /sys/block/mmcblk0rpmb/bdi/read_ahead_kb
+        echo 256 > /sys/block/mmcblk0rpmb/bdi/nr_requests
+        for dm in $dmpts; do
+            echo 512 > $dm/read_ahead_kb
+            echo 256 > $dm/nr_requests
+        done
+    fi
+}
+
 function configure_zram_parameters() {
     MemTotalStr=`cat /proc/meminfo | grep MemTotal`
     MemTotal=${MemTotalStr:16:8}
@@ -296,11 +325,34 @@ function configure_zram_parameters() {
     fi
 }
 
-# Enable ZRAM
-configure_zram_parameters
-echo 0 > /proc/sys/vm/page-cluster
-echo 0 > /sys/module/vmpressure/parameters/allocstall_threshold
-echo 100 > /proc/sys/vm/swappiness
+function configure_memory_parameters() {
+    # Swap only 1 page at a time
+    echo 0 > /proc/sys/vm/page-cluster
+
+    # Set allocstall_threshold to 0 for all targets.
+    echo 0 > /sys/module/vmpressure/parameters/allocstall_threshold
+
+    # Set swappiness to 60 for all targets
+    echo 60 > /proc/sys/vm/swappiness
+
+    # Disable wsf for all targets beacause we are using efk.
+    # wsf Range : 1..1000 So set to bare minimum value 1.
+    echo 1 > /proc/sys/vm/watermark_scale_factor
+
+    # Disable the feature of watermark boost for 8G and below device
+    MemTotalStr=`cat /proc/meminfo | grep MemTotal`
+    MemTotal=${MemTotalStr:16:8}
+
+    if [ $MemTotal -le 8388608 ]; then
+        echo 0 > /proc/sys/vm/watermark_boost_factor
+    fi
+
+    # Enable ZRAM
+    configure_zram_parameters
+    configure_read_ahead_kb_values
+}
+
+configure_memory_parameters
 
 # Enable PowerHAL hint processing
 setprop vendor.powerhal.init 1

rootdir/etc/init.qcom.rc

@@ -213,6 +213,11 @@ on post-fs-data
     chown radio radio /data/vendor/radio/qcril_prebuilt.db
     chmod 0660 /data/vendor/radio/qcril_prebuilt.db
 
+    # set aggressive read ahead for dm-0 and dm-1 during boot up
+    write /sys/block/dm-0/queue/read_ahead_kb 2048
+    write /sys/block/dm-1/queue/read_ahead_kb 2048
+    write /sys/block/dm-2/queue/read_ahead_kb 2048
+
     # Create vpp directory
     mkdir /data/vendor/vpp 0770 media media
 
@@ -225,6 +230,10 @@ on property:sys.boot_completed=1
     # Enable UFS clock scaling back
     write /sys/bus/platform/devices/1d84000.ufshc/clkscale_enable 1
 
+    #Reset read ahead for dm-0 and dm-1 to 512kb
+    write /sys/block/dm-0/queue/read_ahead_kb 512
+    write /sys/block/dm-1/queue/read_ahead_kb 512
+
     chown media audio /sys/kernel/wdsp0/boot
 
     start vendor.qcom-post-boot

rootdir/etc/init.target.rc

@@ -45,18 +45,6 @@ on init
 
     write /sys/module/qpnp_rtc/parameters/poweron_alarm 1
 
-    # Boot time fs tuning
-    write /sys/block/sda/queue/iostats 0
-    write /sys/block/sda/queue/scheduler cfq
-    write /sys/block/sda/queue/iosched/slice_idle 0
-    write /sys/block/sda/queue/read_ahead_kb 2048
-    write /sys/block/sda/queue/nr_requests 256
-    write /sys/block/sde/queue/iostats 0
-    write /sys/block/sde/queue/scheduler cfq
-    write /sys/block/sde/queue/iosched/slice_idle 0
-    write /sys/block/sde/queue/read_ahead_kb 2048
-    write /sys/block/sde/queue/nr_requests 256
-
 on fs
     mount_all --early
 
@@ -127,15 +115,6 @@ on boot
 
     write /sys/block/sda/queue/wbt_lat_usec 75000
 
-on property:sys.boot_completed=1
-    # Runtime fs tuning
-    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/sde/queue/read_ahead_kb 128
-    write /sys/block/sde/queue/nr_requests 128
-    write /sys/block/sde/queue/iostats 1
-
 service vendor.pd_mapper /vendor/bin/pd-mapper
     class core
     user system