Re: [PATCH net-next 0/3] selftests/xsk: stabilize timeout test behavior

[Maciej Fijalkowski <maciej.fijalkowski@intel.com>]

On Wed, Jun 17, 2026 at 07:39:06AM +0800, Jason Xing wrote:
> Hi Tushar,
> 
> On Tue, Jun 16, 2026 at 11:50 PM Tushar Vyavahare
> <tushar.vyavahare@intel.com> wrote:
> >
> > This series improves AF_XDP selftests by making timeout handling
> > explicit and fixing sources of non-determinism in xsk timeout tests.
> >
> > Patch 1 introduces test_spec::poll_tmout and removes implicit
> > dependence on RX UMEM setup state for timeout behavior.
> >
> > Patch 2 fixes thread harness sequencing by attaching XDP programs
> > before worker startup, removing signal-based termination, and using
> > barrier synchronization only for dual-thread runs.
> >
> > Patch 3 restores shared_umem after POLL_TXQ_FULL so test-local
> > configuration does not leak into subsequent cases on shared-netdev
> > runs.
> >
> > Together these changes make timeout handling easier to follow and
> > improve selftest stability, especially on real NIC runs.
> 
> net-next is closed, but in the meantime I'll review the series ASAP.
> 
> BTW, another thing about selftests I had in my mind is that are you
> planning to work on this [1]?

This one is on me. I took your changes Jason and aligned ZC batching side
to this behavior, followed by xskxceiver adjustment. I am planning to send
this today EOD, however let's see how badly internal Sashiko will kick my
ass.

> 
> [1]: https://lore.kernel.org/all/20260520004244.55663-1-kerneljasonxing@gmail.com/
> 
> Thanks,
> Jason
> 
> >
> > Tushar Vyavahare (3):
> >   selftests/xsk: make poll timeout mode explicit
> >   selftests/xsk: fix timeout thread harness sequencing
> >   selftests/xsk: restore shared_umem after POLL_TXQ_FULL
> >
> >  .../selftests/bpf/prog_tests/test_xsk.c       | 96 +++++++++++--------
> >  .../selftests/bpf/prog_tests/test_xsk.h       |  2 +
> >  2 files changed, 56 insertions(+), 42 deletions(-)
> >
> > --
> > 2.43.0
> >
> >
>