On Tue, Sep 23, 2025 at 12:15:45AM +0200, Simon Schippers wrote:

This patch series deals with TUN, TAP and vhost_net which drop incoming 
SKBs whenever their internal ptr_ring buffer is full. Instead, with this 
patch series, the associated netdev queue is stopped before this happens. 
This allows the connected qdisc to function correctly as reported by [1] 
and improves application-layer performance, see our paper [2]. Meanwhile 
the theoretical performance differs only slightly:

About this whole approach.
What if userspace is not consuming packets?
Won't the watchdog warnings appear?
Is it safe to allow userspace to block a tx queue
indefinitely?

-- 
MST