On Wed, Jan 07, 2026 at 09:23:46PM -0800, Vishwanath Seshagiri wrote: > On 1/7/26 12:28 AM, Michael S. Tsirkin wrote: > > 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. > > Thanks! I'll add benchmark numbers in v2 of the patch.
This never came, or did I miss it? > Beyond performance, page pool support is pre requisite for enabling > memory provider based zero copy implementations in virtio_net such as > devmem TCP and io-uring ZCRX. These features require the driver to use > page pools for buffer management. I'll update the cover letter to make > this motivation clearer. > > > > > > > > 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 > >
