From 3d70f56ae72cdf3d98b8a2810351f9c9320e2e25 Mon Sep 17 00:00:00 2001
From: Derek Straka <derek@asterius.io>
Date: Wed, 30 Nov 2016 11:13:18 -0500
Subject: [PATCH] setup-env: only allow slaves with large amounts of RAM to
 mount tmpfs

Signed-off-by: Derek Straka <derek@asterius.io>
---
 scripts/cleanup-env.sh | 5 ++++-
 scripts/setup-env.sh   | 7 ++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/scripts/cleanup-env.sh b/scripts/cleanup-env.sh
index 1367724..9e5ef8b 100755
--- a/scripts/cleanup-env.sh
+++ b/scripts/cleanup-env.sh
@@ -1,5 +1,8 @@
 #!/bin/bash -e
 
-sudo umount build
+# Only attempt to unmount if the directory is already mounted
+if mountpoint -q `pwd`/build; then
+    sudo umount build
+fi
 
 exit 0
diff --git a/scripts/setup-env.sh b/scripts/setup-env.sh
index e5fc3b1..dbed061 100755
--- a/scripts/setup-env.sh
+++ b/scripts/setup-env.sh
@@ -2,6 +2,11 @@
 
 mkdir -p build
 
-sudo mount -t tmpfs -o size=64G,mode=755,uid=${UID} tmpfs build
+total_mem=`grep MemTotal /proc/meminfo | awk '{print $2}'`
+
+# Only have the slaves with large amounts of RAM mount the tmpfs
+if [ "$total_mem" -ge "67108864" ]; then
+    sudo mount -t tmpfs -o size=64G,mode=755,uid=${UID} tmpfs build
+fi
 
 exit 0