sdm710-common: rootdir: Remove IO read_ahead_kb tune

If we set 2048KB ra value in the beginning of the
boot process, services initialized at this time would
keep 2048KB ra value even though we adjust the ra value
to 512KB after boot completion.

This may cause memory pressure.

[B--B: disabled configure_read_ahead_kb_values in init.qcom.post_boot.sh]

Bug: 174700194
Signed-off-by: Randall Huang <huangrandall@google.com>
Change-Id: I97ee0ee9511eaada011f2634afd68d68cdca4570
Signed-off-by: Marco Zanin <mrczn.bb@gmail.com>

rootdir/bin/init.qcom.post_boot.sh

@@ -795,7 +795,7 @@ else
 
     configure_zram_parameters
 
-    configure_read_ahead_kb_values
+    # configure_read_ahead_kb_values
 
     enable_swap
 fi

rootdir/etc/init.qcom.rc

@@ -358,11 +358,6 @@ on post-fs-data
     mkdir /data/vendor/swap 0770 root system
     chmod 2770 /data/vendor/swap
 
-    # 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
 
@@ -450,9 +445,6 @@ on property:persist.vendor.sys.rawdump_copy=0
 
 on property:sys.boot_completed=1
     write /dev/kmsg "Boot completed "
-    #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
     #WDSP FW boot sysfs node used by STHAL
     chown media audio /sys/kernel/wdsp0/boot
     chown media audio /sys/kernel/wcd_cpe0/fw_name