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Date: Mon, 22 Jun 2026 16:07:06 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Cc: Jason Xing <kerneljasonxing@gmail.com>, Tushar Vyavahare
 <tushar.vyavahare@intel.com>, <netdev@vger.kernel.org>,
 <magnus.karlsson@intel.com>, <stfomichev@gmail.com>,
 <kernelxing@tencent.com>, <davem@davemloft.net>, <pabeni@redhat.com>,
 <ast@kernel.org>, <daniel@iogearbox.net>, <tirthendu.sarkar@intel.com>,
 <bpf@vger.kernel.org>
Subject: Re: [PATCH net-next 0/3] selftests/xsk: stabilize timeout test
 behavior
Message-ID: <20260622160706.0b4a27bf@kernel.org>
In-Reply-To: <ajJsMj0QMOF5I8qq@boxer>
References: <20260616154955.1492560-1-tushar.vyavahare@intel.com>
	<CAL+tcoDr0gtCPeGi1yOUtg+ZD2YxEbjAy41LBgG63b8-=CStcw@mail.gmail.com>
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On Wed, 17 Jun 2026 11:43:14 +0200 Maciej Fijalkowski wrote:
> > On Tue, Jun 16, 2026 at 11:50=E2=80=AFPM Tushar Vyavahare
> > <tushar.vyavahare@intel.com> wrote: =20
> > >
> > > 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. =20
> >=20
> > net-next is closed, but in the meantime I'll review the series ASAP.
> >=20
> > BTW, another thing about selftests I had in my mind is that are you
> > planning to work on this [1]? =20
>=20
> 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.

Hi Maciej, do you want these applied? If they help make the tests less
flaky I think that it's fine to take them during the merge window.