[DPDK/ethdev Bug 1622] ntnic: using signals and threads

[DPDK/ethdev Bug 1622] ntnic: using signals and threads

[bugzilla]

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https://bugs.dpdk.org/show_bug.cgi?id=1622

            Bug ID: 1622
           Summary: ntnic: using signals and threads
           Product: DPDK
           Version: 25.03
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: major
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: stephen@networkplumber.org
  Target Milestone: ---

No PMD should be making its own threads and must not use standard signal types.
The ntnic PMD is spawning a thread and trying to trap SIGINT.
This is broken for many reasons:
  - application may want to manage SIGINT after rte_eal_init() is called
  - there are other shutdown signals beside SIGINT (SIGTERM, SIGQUIT, ...)
  - spawning a thread outside of EAL creates resource management issues

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