From 901c955f6948cadc97472aa4323645f63e06e2ab Mon Sep 17 00:00:00 2001
From: Dirk
Date: Sun, 16 Dec 2012 16:12:35 +0100
Subject: Use zram if available (assign a quarter for compressed ram swap)

---
 src/initramfs/scripts/bin/hwautocfg | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

(limited to 'src')

diff --git a/src/initramfs/scripts/bin/hwautocfg b/src/initramfs/scripts/bin/hwautocfg
index 482c9f9a..3548abaa 100755
--- a/src/initramfs/scripts/bin/hwautocfg
+++ b/src/initramfs/scripts/bin/hwautocfg
@@ -1,6 +1,6 @@
 #!/bin/sh
 # Copyright (c) 2003..2006 - RZ Uni Freiburg
-# Copyright (c) 2006..2011 - OpenSLX GmbH
+# Copyright (c) 2006..2012 - OpenSLX GmbH
 #
 # This program is free software distributed under the GPL version 2.
 # See http://openslx.org/COPYING
@@ -277,12 +277,18 @@ case $1 in
   # disk setup part (detecting general id82,83 and slx id44,45,46, formatting 
   # if required and mounting)
   disk)
-    # try to enable compressed RAM SWAP
+    # try to enable compressed RAM SWAP / ZRAM
     if modprobe ${MODPRV} ramzswap 2>/dev/null && [ -f /usr/bin/rzscontrol ] ; then
       mdev -s
       rzscontrol /dev/ramzswap0 --init
-      swapon /dev/ramzswap0
+      swapon /dev/ramzswap0 2>/dev/null
       #hdswap="# disk swap disabled because of enabled compressed ramswap"
+    elif modprobe ${MODPRV} zram 2>/dev/null ; then
+      mdev -s
+      # assign a quarter of total mem to zram
+      echo $(( $(free -k | awk '/^Mem:/ { print $2 }') * 256 )) > /sys/block/zram0/disksize
+      mkswap /dev/zram0 2>/dev/null
+      swapon /dev/zram0 2>/dev/null
     fi
     # if disk action is not disabled
     if [ "x${hw_local_disk}" != "xno" ] ; then
-- 
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