netdev - Re: [PATCH 0/2] virtio_net: add page

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Message-ID: <20260107032738-mutt-send-email-mst@kernel.org>
Date: Wed, 7 Jan 2026 03:28:05 -0500
From: "Michael S. Tsirkin" <mst@...hat.com>
To: Vishwanath Seshagiri <vishs@...a.com>
Cc: Jason Wang <jasowang@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Eugenio Pérez <eperezma@...hat.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	David Wei <dw@...idwei.uk>, netdev@...r.kernel.org,
	virtualization@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] virtio_net: add page_pool support

On Tue, Jan 06, 2026 at 02:19:22PM -0800, Vishwanath Seshagiri wrote:
> Introduce page_pool support in virtio_net driver in order to recycle
> pages in RX buffer allocation and avoid reallocating through the page
> allocator. This applies to mergeable and small buffer modes.
> 
> The patch has been tested using the included selftests and additional
> edge case scripts covering device unbind/bind cycles, rapid interface
> open/close, traffic during close, ethtool stress with feature toggling,
> close with pending refill work, and data integrity verification.


Yay! thanks for working on this!
Could you share perf data please?
After all, page pool is an optimization.


> Vishwanath Seshagiri (2):
>   virtio_net: add page pool support for buffer allocation
>   selftests: virtio_net: add buffer circulation test
> 
>  drivers/net/virtio_net.c                      | 246 +++++++++++++++---
>  .../drivers/net/virtio_net/basic_features.sh  |  70 +++++
>  2 files changed, 275 insertions(+), 41 deletions(-)
> 
> -- 
> 2.47.3