On Mon, 27 Jan 2025 18:17:28 +0800 Jason Xing <kerneljasonxing(a)gmail.com> wrote:I'm not that sure if it's a bug belonging to the Linux kernel.It is, because for at least 20-25 years (before that it's a bit hard to understand from history) a non-zero window would be announced, as obviously expected, once there's again space in the receive window.The other side not sending a window probe causes this issue...?It doesn't cause this issue, but it triggers it.The other part of me says we cannot break the user's behaviour.This sounds quite relevant, yes. -- Stefano