netdev - Re: [PATCH net-next 1/2] selftests: net: use slowwait to stabilize vrf_route

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Message-ID: <20250618103358.GB1699@horms.kernel.org>
Date: Wed, 18 Jun 2025 11:33:58 +0100
From: Simon Horman <horms@...nel.org>
To: Hangbin Liu <liuhangbin@...il.com>
Cc: netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH net-next 1/2] selftests: net: use slowwait to stabilize
 vrf_route_leaking test

On Tue, Jun 17, 2025 at 10:50:59AM +0000, Hangbin Liu wrote:
> The vrf_route_leaking test occasionally fails due to connectivity issues
> in our testing environment. A sample failure message shows that the ping
> check fails intermittently
> 
>   PING 2001:db8:16:2::2 (2001:db8:16:2::2) 56 data bytes
> 
>   --- 2001:db8:16:2::2 ping statistics ---
>   1 packets transmitted, 0 received, 100% packet loss, time 0ms
> 
>   TEST: Basic IPv6 connectivity                                       [FAIL]
> 
> This is likely due to insufficient wait time on slower machines. To address
> this, switch to using slowwait, which provides a longer and more reliable
> wait for setup completion.
> 
> Before this change, the test failed 3 out of 10 times. After applying this
> fix, the test was run 30 times without any failure.
> 
> Signed-off-by: Hangbin Liu <liuhangbin@...il.com>

Reviewed-by: Simon Horman <horms@...nel.org>