From: patchwork-bot+netdevbpf@kernel.org
To: Jason Wang <jasowang@redhat.com>
Cc: mst@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com,
andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com,
virtualization@lists.linux.dev, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH net V2] virtio_net: fix alignment for virtio_net_hdr_v1_hash
Date: Wed, 05 Nov 2025 01:30:14 +0000 [thread overview]
Message-ID: <176230621499.3052151.14134188371623590372.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20251031060551.126-1-jasowang@redhat.com>
Hello:
This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:
On Fri, 31 Oct 2025 14:05:51 +0800 you wrote:
> From: "Michael S. Tsirkin" <mst@redhat.com>
>
> Changing alignment of header would mean it's no longer safe to cast a
> 2 byte aligned pointer between formats. Use two 16 bit fields to make
> it 2 byte aligned as previously.
>
> This fixes the performance regression since
> commit ("virtio_net: enable gso over UDP tunnel support.") as it uses
> virtio_net_hdr_v1_hash_tunnel which embeds
> virtio_net_hdr_v1_hash. Pktgen in guest + XDP_DROP on TAP + vhost_net
> shows the TX PPS is recovered from 2.4Mpps to 4.45Mpps.
>
> [...]
Here is the summary with links:
- [net,V2] virtio_net: fix alignment for virtio_net_hdr_v1_hash
https://git.kernel.org/netdev/net/c/c3838262b824
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
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next prev parent reply other threads:[~2025-11-05 1:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-31 6:05 [PATCH net V2] virtio_net: fix alignment for virtio_net_hdr_v1_hash Jason Wang
2025-11-04 17:21 ` Lei Yang
2025-11-05 1:30 ` patchwork-bot+netdevbpf [this message]
2025-11-05 7:17 ` Michael S. Tsirkin
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