netdev - Re: [PATCH net 0/2] selftests: pmtu.sh: Fix cleanup of processes launched in subshell.

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Date:   Tue, 8 Mar 2022 16:51:46 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Guillaume Nault <gnault@...hat.com>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, David Ahern <dsahern@...il.com>,
        Vadim Fedorenko <vfedorenko@...ek.ru>,
        Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH net 0/2] selftests: pmtu.sh: Fix cleanup of processes
 launched in subshell.

On 3/8/22 3:14 PM, Guillaume Nault wrote:
> Depending on the options used, pmtu.sh may launch tcpdump and nettest
> processes in the background. However it fails to clean them up after
> the tests complete.
> 
> Patch 1 allows the cleanup() function to read the list of PIDs launched
> by the tests.
> Patch 2 fixes the way the nettest PIDs are retrieved.
> 
> v2:
>    * Use tcpdump's immediate mode to capture packets even in short lived
>      tests.
>    * Add patch 2 to fix the nettest_pids list.
> 
> Guillaume Nault (2):
>    selftests: pmtu.sh: Kill tcpdump processes launched by subshell.
>    selftests: pmtu.sh: Kill nettest processes launched in subshell.
> 
>   tools/testing/selftests/net/pmtu.sh | 21 +++++++++++++++++----
>   1 file changed, 17 insertions(+), 4 deletions(-)
> 

Both of these look good to me. One nit on commit header. Please
include net in the patch subject line in the future.

e.g: selftests:net pmtu.sh

Tested them on my system. Seeing these messages even after building
nettest:

'nettest' command not found; skipping tests
   xfrm6udp not supported
TEST: vti6: PMTU exceptions (ESP-in-UDP)                            [SKIP]
'nettest' command not found; skipping tests
   xfrm4udp not supported
TEST: vti4: PMTU exceptions (ESP-in-UDP)                            [SKIP]
'nettest' command not found; skipping tests
   xfrm6udprouted not supported
TEST: vti6: PMTU exceptions, routed (ESP-in-UDP)                    [SKIP]
'nettest' command not found; skipping tests
   xfrm4udprouted not supported

Might not be related to this patch though. I jusr ran pmtu.sh from
net directory.


Reviewed-by: Shuah Khan <skhan@...uxfoundation.org>

thanks,
-- Shuah