On Wed, Sep 24, 2025 at 3:18 PM Michael S. Tsirkin <[email protected]> wrote: > > 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?
I think it's safe as it's a userspace device, there's no way to guarantee the userspace can process the packet in time (so no watchdog for TUN). Thanks > > -- > MST >
