[PATCH rcu 08/21] torture: Protect kvm-remote.sh directory trees from /tmp reaping

Paul E. McKenney
2021-07-21T21:02:12Z

The kvm-remote.sh script places the datestamped directory containing
all the build artifacts in the destination systems' /tmp directories,
where they accumulate runtime artifacts such as console.log. This works,
but some systems have a habit of removing files in /tmp that have not
been recently accessed. This commit therefore runs a simple script that
periodically accesses all files in the datestamped directory.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
.../rcutorture/bin/kvm-remote-noreap.sh | 30 +++++++++++++++++++
.../selftests/rcutorture/bin/kvm-remote.sh | 3 +-
2 files changed, 32 insertions(+), 1 deletion(-)
create mode 100755 tools/testing/selftests/rcutorture/bin/kvm-remote-noreap.sh

diff --git a/tools/testing/selftests/rcutorture/bin/kvm-remote-noreap.sh b/tools/testing/selftests/rcutorture/bin/kvm-remote-noreap.sh
new file mode 100755
index 0000000000000..014ce68260d78
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-remote-noreap.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Periodically scan a directory tree to prevent files from being reaped
+# by systemd and friends on long runs.
+#
+# Usage: kvm-remote-noreap.sh pathname
+#
+# Copyright (C) 2021 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+pathname="$1"
+if test "$pathname" = ""
+then
+ echo Usage: kvm-remote-noreap.sh pathname
+ exit 1
+fi
+if ! test -d "$pathname"
+then
+ echo Usage: kvm-remote-noreap.sh pathname
+ echo " pathname must be a directory."
+ exit 2
+fi
+
+while test -d "$pathname"
+do
+ find "$pathname" -type f -exec touch -c {} \; > /dev/null 2>&1
+ sleep 30
+done
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-remote.sh b/tools/testing/selftests/rcutorture/bin/kvm-remote.sh
index 8f26dbfc2edf2..f52641fdd1fe7 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-remote.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-remote.sh
@@ -124,10 +124,11 @@ awk < "$rundir"/scenarios -v dest="$T/bin" -v rundir="$rundir" '
n = $1;
sub(/\./, "", n);
fn = dest "/kvm-remote-" n ".sh"
+ print "kvm-remote-noreap.sh " rundir " &" > fn;
scenarios = "";
for (i = 2; i <= NF; i++)
scenarios = scenarios " " $i;
- print "kvm-test-1-run-batch.sh" scenarios > fn;
+ print "kvm-test-1-run-batch.sh" scenarios >> fn;
print "sync" >> fn;
print "rm " rundir "/remote.run" >> fn;
}'
--
2.31.1.189.g2e36527f23