From: "Paul E. McKenney" <paulmck@xxxxxxxxxx>
[ Upstream commit c64659ef29e3901be0900ec6fb0485fa3dbdcfd8 ]
Even when the kernel panics and qemu dies, runs with jitter enabled will
continue uselessly until the jitter.sh processes terminate. This can
be annoying if a planned one-hour run instead dies during boot.
This commit therefore kills the jitter.sh processes when the run ends
more than one minute prior to the termination time specified by the
kvm.sh --duration argument or its default.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
.../selftests/rcutorture/bin/kvm-test-1-run.sh | 14 ++++++++++++++
tools/testing/selftests/rcutorture/bin/kvm.sh | 5 ++++-
2 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh
index 33c6696197364..a0e01a69d0d25 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh
@@ -197,6 +197,20 @@ do
echo "ps -fp $killpid" >> $resdir/Warnings 2>&1
ps -fp $killpid >> $resdir/Warnings 2>&1
fi
+ # Reduce probability of PID reuse by allowing a one-minute buffer
+ if test $((kruntime + 60)) -lt $seconds && test -s "$resdir/../jitter_pids"
+ then
+ awk < "$resdir/../jitter_pids" '
+ NF > 0 {
+ pidlist = pidlist " " $1;
+ n++;
+ }
+ END {
+ if (n > 0) {
+ print "kill " pidlist;
+ }
+ }' | sh
+ fi
else
echo ' ---' `date`: "Kernel done"
fi
diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index 72518580df236..a9a6f81d9564c 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -404,8 +404,11 @@ function dump(first, pastlast, batchnum)
print "if test -n \"$needqemurun\""
print "then"
print "\techo ---- Starting kernels. `date` | tee -a " rd "log";
- for (j = 0; j < njitter; j++)
+ print "\techo > " rd "jitter_pids"
+ for (j = 0; j < njitter; j++) {
print "\tjitter.sh " j " " dur " " ja[2] " " ja[3] "&"
+ print "\techo $! >> " rd "jitter_pids"
+ }
print "\twait"
print "\techo ---- All kernel runs complete. `date` | tee -a " rd "log";
print "else"
--
2.27.0
