From: Paolo Abeni <pabeni@redhat.com>
To: Jakub Kicinski <kuba@kernel.org>, Koichiro Den <den@valinux.co.jp>
Cc: Jon Mason <jdmason@kudzu.us>, Dave Jiang <dave.jiang@intel.com>,
Allen Hubbe <allenbh@gmail.com>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
ntb@lists.linux.dev, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next v3 4/4] net: ntb_netdev: Preserve CHECKSUM_PARTIAL across NTB
Date: Fri, 11 Sep 2026 11:47:52 +0200 [thread overview]
Message-ID: <9ba2c3d5-825d-4494-a0c6-d5c0ac699189@redhat.com> (raw)
In-Reply-To: <20260910172047.167225eb@kernel.org>
On 9/11/26 2:20 AM, Jakub Kicinski wrote:
> On Fri, 4 Sep 2026 14:21:34 +0900 Koichiro Den wrote:
>> Calculating L4 checksums can limit ntb_netdev throughput especially on
>> embedded systems, where CPU resources are often limited. A trusted PCIe
>> fabric can avoid that work.
>
> Would it make more sense to prepend something like a virtio_net_hdr
> to the data so you can cheaply express more offloads?
FTR, I think it makes sense to consolidate similar code, with one possible
caveat: virtio_net is not spectacularly flexible in term of supporting
"new" stuff: if this use-case would need some special behavior, it could
be problematic.
AFAICS the intended usage is quite basic, so no big surprise expected, and
also I guess that only a serious attempt could tell...
/P
prev parent reply other threads:[~2026-09-11 9:47 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-04 5:21 [PATCH net-next v3 0/4] net: ntb_netdev: Preserve checksum offload " Koichiro Den
2026-09-04 5:21 ` [PATCH net-next v3 1/4] NTB: ntb_transport: Order RX descriptor reads after completion Koichiro Den
2026-09-04 5:21 ` [PATCH net-next v3 2/4] NTB: ntb_transport: Use little-endian shared fields Koichiro Den
2026-09-04 5:21 ` [PATCH net-next v3 3/4] NTB: ntb_transport: Add per-payload client metadata Koichiro Den
2026-09-09 20:24 ` netdev-bot+sashiko
2026-09-11 0:18 ` Jakub Kicinski
2026-09-11 7:48 ` Koichiro Den
2026-09-04 5:21 ` [PATCH net-next v3 4/4] net: ntb_netdev: Preserve CHECKSUM_PARTIAL across NTB Koichiro Den
2026-09-09 20:24 ` netdev-bot+sashiko
2026-09-11 5:49 ` Koichiro Den
2026-09-11 0:20 ` Jakub Kicinski
2026-09-11 5:41 ` Koichiro Den
2026-09-11 9:47 ` Paolo Abeni [this message]
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