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Message-ID: <CANn89i+7YeP+N-4bWgU=dMBEhRZBjaY4njv+WhbvbVde_7DoOg@mail.gmail.com> Date: Fri, 11 Aug 2023 09:37:38 +0200 From: Eric Dumazet <edumazet@...gle.com> To: menglong8.dong@...il.com Cc: ncardwell@...gle.com, davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com, dsahern@...nel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, flyingpeng@...cent.com, Menglong Dong <imagedong@...cent.com> Subject: Re: [PATCH net-next v4 1/4] net: tcp: send zero-window ACK when no memory On Fri, Aug 11, 2023 at 5:01 AM <menglong8.dong@...il.com> wrote: > > From: Menglong Dong <imagedong@...cent.com> > > For now, skb will be dropped when no memory, which makes client keep > retrans util timeout and it's not friendly to the users. > > In this patch, we reply an ACK with zero-window in this case to update > the snd_wnd of the sender to 0. Therefore, the sender won't timeout the > connection and will probe the zero-window with the retransmits. > > Signed-off-by: Menglong Dong <imagedong@...cent.com> > --- Reviewed-by: Eric Dumazet <edumazet@...gle.com>
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