On Tue, Apr 15, 2025 at 07:28:16PM +0200, Alexander Lobakin wrote: > When XDP Tx queues are not interrupt-driven but use lazy cleaning, > i.e. only when there are less than `threshold` free descriptors left, > we also need cleanup timers to avoid &xdp_buff and &xdp_frame stall > for too long, especially with Page Pool (it warns every about inflight > pages every 60 second). > Let's say we sent 256 frames and don't need to send more, but we clean > only when the number of pending items >= 384. In that case, those 256 > will stall until 128 more are sent. For this, add simple helpers to > run a timer which will clean the queue regardless, after 1 second of > the last send. > The timer is triggered when finalizing the queue. As long as there is > regular active traffic, the timer doesn't fire. > > Signed-off-by: Alexander Lobakin <aleksander.lobakin@xxxxxxxxx> Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@xxxxxxxxx>
