Re: [PATCH v9 net-next 01/15] tcp: try to avoid safer when ACKs are thinned

On Mon, Jan 19, 2026 at 7:59 PM [off-list ref] wrote:

From: Ilpo Järvinen <ij@kernel.org>

Add newly acked pkts EWMA. When ACK thinning occurs, select
between safer and unsafe cep delta in AccECN processing based
on it. If the packets ACKed per ACK tends to be large, don't
conservatively assume ACE field overflow.

This patch uses the existing 2-byte holes in the rx group for new
u16 variables withtout creating more holes. Below are the pahole
outcomes before and after this patch:

Reviewed-by: Eric Dumazet <edumazet@google.com>