From 4eb137815540fec6b774680d1054154911d7b15e Mon Sep 17 00:00:00 2001
From: Tomas M <tomas@slax.org>
Date: Thu, 18 May 2017 02:14:01 -0500
Subject: [PATCH] activate zram only if available

---
 livekitlib | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/livekitlib b/livekitlib
index 4a9a1d0..985c5c6 100644
--- a/livekitlib
+++ b/livekitlib
@@ -168,11 +168,13 @@ init_zram()
 {
    debug_log "init_zram" "$*"
    echo_green_star
-   echo "Setting dynamic RAM compression using ZRAM"
-   echo 536870912 > /sys/block/zram0/disksize # 512MB
-   mkswap /dev/zram0 >/dev/null
-   swapon /dev/zram0 -p 32767
-   echo 100 > /proc/sys/vm/swappiness
+   echo "Setting dynamic RAM compression using ZRAM if available"
+   if [ -r /sys/block/zram0/disksize ]; then
+      echo 536870912 > /sys/block/zram0/disksize # 512MB
+      mkswap /dev/zram0 >/dev/null
+      swapon /dev/zram0 -p 32767
+      echo 100 > /proc/sys/vm/swappiness
+   fi
 }
 
 # load the AUFS kernel module if needed