[PATCH] selftests: fib_tests: sleep after changing carrier. again.

[PATCH] selftests: fib_tests: sleep after changing carrier. again.

[Thadeu Lima de Souza Cascardo]

Just like commit e2ba732a1681 ("selftests: fib_tests: sleep after
changing carrier"), wait one second to allow linkwatch to propagate the
carrier change to the stack.

There are two sets of carrier tests. The first slept after the carrier
was set to off, and when the second set ran, it was likely that the
linkwatch would be able to run again without much delay, reducing the
likelihood of a race. However, if you run 'fib_tests.sh -t carrier' on a
loop, you will quickly notice the failures.

Sleeping on the second set of tests make the failures go away.

Cc: David Ahern <dsahern@gmail.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
---
 tools/testing/selftests/net/fib_tests.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh
index 802b4af18729..1080ff55a788 100755
--- a/tools/testing/selftests/net/fib_tests.sh
+++ b/tools/testing/selftests/net/fib_tests.sh
@@ -388,6 +388,7 @@ fib_carrier_unicast_test()
 
 	set -e
 	$IP link set dev dummy0 carrier off
+	sleep 1
 	set +e
 
 	echo "    Carrier down"
-- 
2.20.1

Re: [PATCH] selftests: fib_tests: sleep after changing carrier. again.

[David Ahern]

On 2/22/19 5:27 AM, Thadeu Lima de Souza Cascardo wrote:
> Just like commit e2ba732a1681 ("selftests: fib_tests: sleep after
> changing carrier"), wait one second to allow linkwatch to propagate the
> carrier change to the stack.
> 
> There are two sets of carrier tests. The first slept after the carrier
> was set to off, and when the second set ran, it was likely that the
> linkwatch would be able to run again without much delay, reducing the
> likelihood of a race. However, if you run 'fib_tests.sh -t carrier' on a
> loop, you will quickly notice the failures.
> 
> Sleeping on the second set of tests make the failures go away.
> 
> Cc: David Ahern <dsahern@gmail.com>
> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
> ---
>  tools/testing/selftests/net/fib_tests.sh | 1 +
>  1 file changed, 1 insertion(+)
> 

Reviewed-by: David Ahern <dsahern@gmail.com>

Re: [PATCH] selftests: fib_tests: sleep after changing carrier. again.

[David Miller]

From: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Date: Fri, 22 Feb 2019 07:27:41 -0300

> Just like commit e2ba732a1681 ("selftests: fib_tests: sleep after
> changing carrier"), wait one second to allow linkwatch to propagate the
> carrier change to the stack.
> 
> There are two sets of carrier tests. The first slept after the carrier
> was set to off, and when the second set ran, it was likely that the
> linkwatch would be able to run again without much delay, reducing the
> likelihood of a race. However, if you run 'fib_tests.sh -t carrier' on a
> loop, you will quickly notice the failures.
> 
> Sleeping on the second set of tests make the failures go away.
> 
> Cc: David Ahern <dsahern@gmail.com>
> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

Applied, thanks.