testenv: Set ulimit to unlimited instead of a fixed number

Raising the ulimit to a fixed value doesn't work reliably: When we're only
loading a single program it works fine, but the limit is global for the
system, so if something else (e.g., another map or program) is already
loaded, the ulimit requirement is higher.

Rather than trying to guess, just set the memlock ulimit to unlimited.

Fixes #86.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>

Author: tohojo

testenv/testenv.sh

@@ -16,7 +16,6 @@ source "$(dirname "$0")/config.sh"
 
 NEEDED_TOOLS="ethtool ip tc ping"
 MAX_NAMELEN=15
-MIN_ULIMIT_L=4096
 
 # Global state variables that will be set by options etc below
 GENERATE_NEW=0
@@ -67,9 +66,7 @@ check_prereq()
     [ -d "$STATEDIR" ] || mkdir -p "$STATEDIR" || die "Unable to create state dir $STATEDIR"
 
     if [ "$max_locked_mem" != "unlimited" ]; then
-	if [ "$max_locked_mem" -ge "$MIN_ULIMIT_L" ]; then
-	    ulimit -l "$MIN_ULIMIT_L" || die "Unable to set ulimit"
-	fi
+	ulimit -l unlimited || die "Unable to set ulimit"
     fi
 }