From e45fc8635926f70b0e19d5214f1f8b8fd06068aa Mon Sep 17 00:00:00 2001
From: Holger Hans Peter Freyther <zecke@selfish.org>
Date: Sat, 16 Mar 2013 00:24:24 +0100
Subject: [PATCH] respawn: Adjust the oom score for the supervisor and bts/pcu,
 increase sleep

Make the script mostly unkillable due to OOM and make sure that the
process has a score of zero. Wait 10 seconds before re-launching.

The combination of ( && exec ) & appears to save one sub-process. The
script has been tested with bash and busybox's ash.
---
 contrib/respawn-only.sh | 10 +++++++++-
 contrib/respawn.sh      | 12 +++++++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/contrib/respawn-only.sh b/contrib/respawn-only.sh
index 4f611dd2a..66aaac79d 100755
--- a/contrib/respawn-only.sh
+++ b/contrib/respawn-only.sh
@@ -1,4 +1,12 @@
 #!/bin/sh
+
+PID=$$
+echo "-1000" > /proc/$PID/oom_score_adj
+
+
 while [ -f $1 ]; do
-	nice -n -20 $*
+	(echo "0" > /proc/self/oom_score_adj && exec nice -n -20 $*) &
+	LAST_PID=$!
+	wait $LAST_PID
+	sleep 10s
 done
diff --git a/contrib/respawn.sh b/contrib/respawn.sh
index 0798a47a9..44e4fdc3c 100755
--- a/contrib/respawn.sh
+++ b/contrib/respawn.sh
@@ -1,6 +1,16 @@
 #!/bin/sh
+
+PID=$$
+echo "-1000" > /proc/$PID/oom_score_adj
+
 while [ -e /etc/passwd ]; do
+	cat /lib/firmware/sysmobts-v?.bit > /dev/fpgadl_par0
+	sleep 2s
 	cat /lib/firmware/sysmobts-v?.out > /dev/dspdl_dm644x_0
+	sleep 1s
 	echo "0" > /sys/class/leds/activity_led/brightness
-	nice -n -20 $*
+	(echo "0" > /proc/self/oom_score_adj && exec nice -n -20 $*) &
+	LAST_PID=$!
+	wait $LAST_PID
+	sleep 10s
 done