Subject: [PATCH net-next] selftests/net: force synchronized GC for a test.

From: Kui-Feng Lee <[email-masked]>
Date: Fri, 23 Feb 2024 00:13:46 -0800

Due to the slowness of the test environment, always set off a synchronized
GC after waiting for GC. This can fix the problem that Fib6 garbage
collection test fails occasionally.

Signed-off-by: Kui-Feng Lee <[email-masked]>
---
 tools/testing/selftests/net/fib_tests.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh
index 3ec1050e47a2..0a82c9bc07bb 100755
--- a/tools/testing/selftests/net/fib_tests.sh
+++ b/tools/testing/selftests/net/fib_tests.sh
@@ -823,7 +823,9 @@ fib6_gc_test()
 	    $IP -6 route add 2001:20::$i \
 		via 2001:10::2 dev dummy_10 expires $EXPIRE
 	done
+	# Wait for GC
 	sleep $(($EXPIRE * 2 + 1))
+	$NS_EXEC sysctl -wq net.ipv6.route.flush=1
 	check_rt_num 0 $($IP -6 route list |grep expires|wc -l)
 	log_test $ret 0 "ipv6 route garbage collection (with permanent routes)"
 
@@ -864,7 +866,7 @@ fib6_gc_test()
 
 	# Wait for GC
 	sleep $(($EXPIRE * 2 + 1))
-
+	$NS_EXEC sysctl -wq net.ipv6.route.flush=1
 	check_rt_num 5 $($IP -6 route list |grep -v expires|grep 2001:20::|wc -l)
 	log_test $ret 0 "ipv6 route garbage collection (replace with permanent)"
 
-- 
2.34.1