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

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Date:   Wed, 9 Mar 2022 01:55:06 +0100
From:   Guillaume Nault <gnault@...hat.com>
To:     Shuah Khan <skhan@...uxfoundation.org>
Cc:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        David Ahern <dsahern@...il.com>,
        Vadim Fedorenko <vfedorenko@...ek.ru>,
        Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH net 0/2] selftests: pmtu.sh: Fix cleanup of processes
 launched in subshell.

On Tue, Mar 08, 2022 at 04:51:46PM -0700, Shuah Khan wrote:
> 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

Thanks, I'll do that next time (I just reused keywords used by other
commits for this file).

> 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.

Personally I just modified my PATH before running pmtu.sh. Not sure if
there's a better way. But in any case, that's not related to this
patch.

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