[PATCH v6] app/testpmd: monitor state of primary process when using secondary

[Stephen Hemminger]

On Wed, 30 Jul 2025 02:08:18 -0400
Khadem Ullah <14pwcse1224 at uetpeshawar.edu.pk> wrote:

> In secondary processes, accessing device after primary has exited
> will cause crash.
> 
> This patch adds a mechanism in testpmd to monitor the primary process
> from the secondary process.
> When primary process exits it forces secondary to exit avoiding
> issues from cleanup logic.
> 
> Fixes: a550baf24af9 ('app/testpmd: support multi-process')
> Cc: stable at dpdk.org
> 
> Signed-off-by: Khadem Ullah <14pwcse1224 at uetpeshawar.edu.pk>
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>

The problem with this patch, is the build now fails on Windows
where there is no primary/secondary process support.

Either add stubs for Windows or #ifdef the code in test-pmd
as necessary.