netdev - Re: [PATCH net-next] io_uring/zcrx: enable tcp-data-split in selftest

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Message-ID: <20250409170622.5085484a@kernel.org>
Date: Wed, 9 Apr 2025 17:06:22 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: David Wei <dw@...idwei.uk>
Cc: netdev@...r.kernel.org, Andrew Lunn <andrew+netdev@...n.ch>, Paolo Abeni
 <pabeni@...hat.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>
Subject: Re: [PATCH net-next] io_uring/zcrx: enable tcp-data-split in
 selftest

On Wed,  9 Apr 2025 09:31:53 -0700 David Wei wrote:
> For bnxt when the agg ring is used then tcp-data-split is automatically
> reported to be enabled, but __net_mp_open_rxq() requires tcp-data-split
> to be explicitly enabled by the user.

> diff --git a/tools/testing/selftests/drivers/net/hw/iou-zcrx.py b/tools/testing/selftests/drivers/net/hw/iou-zcrx.py
> index 9f271ab6ec04..6a0378e06cab 100755
> --- a/tools/testing/selftests/drivers/net/hw/iou-zcrx.py
> +++ b/tools/testing/selftests/drivers/net/hw/iou-zcrx.py
> @@ -35,6 +35,7 @@ def test_zcrx(cfg) -> None:
>      rx_ring = _get_rx_ring_entries(cfg)
>  
>      try:
> +        ethtool(f"-G {cfg.ifname} tcp-data-split on", host=cfg.remote)

You should really use defer() to register the "undo" actions
individually. Something like:

         ethtool(f"-G {cfg.ifname} tcp-data-split on", host=cfg.remote)
         defer(ethtool, f"-G {cfg.ifname} rx {rx_ring}", host=cfg.remote)
         ethtool(f"-G {cfg.ifname} rx 64", host=cfg.remote)
         defer(ethtool, f"-G {cfg.ifname} rx {rx_ring}", host=cfg.remote)
         ethtool(f"-X {cfg.ifname} equal {combined_chans - 1}", host=cfg.remote)
         defer(ethtool, f"-X {cfg.ifname} default", host=cfg.remote)
         ...

This patch is fine. But could you follow up and convert the test fully?