Re: [PATCH v2 0/3] virtio: Fixes for TX ring sizing and resize error reporting

From: Laurent Vivier
Date: Mon Jun 16 2025 - 09:07:48 EST


On 28/05/2025 09:20, Michael S. Tsirkin wrote:
On Wed, May 28, 2025 at 08:24:32AM +0200, Paolo Abeni wrote:
On 5/21/25 11:22 AM, Laurent Vivier wrote:
This patch series contains two fixes and a cleanup for the virtio subsystem.

The first patch fixes an error reporting bug in virtio_ring's
virtqueue_resize() function. Previously, errors from internal resize
helpers could be masked if the subsequent re-enabling of the virtqueue
succeeded. This patch restores the correct error propagation, ensuring that
callers of virtqueue_resize() are properly informed of underlying resize
failures.

The second patch does a cleanup of the use of '2+MAX_SKB_FRAGS'

The third patch addresses a reliability issue in virtio_net where the TX
ring size could be configured too small, potentially leading to
persistently stopped queues and degraded performance. It enforces a
minimum TX ring size to ensure there's always enough space for at least one
maximally-fragmented packet plus an additional slot.

@Michael: it's not clear to me if you prefer take this series via your
tree or if it should go via net. Please LMK, thanks!

Paolo

Given 1/3 is in virtio I was going to take it. Just after rc1,
though.


Hi Michael,

rc2 is out. Do you always plan to merge these fixes?

Thanks,
Laurent