netdev - Re: debugging TCP stalls on high-speed wifi

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <90485ecbfa2a13c4438b840c8a9d37677e833ea5.camel@sipsolutions.net>
Date:   Fri, 13 Dec 2019 08:43:26 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     Justin Capella <justincapella@...il.com>
Cc:     Eric Dumazet <eric.dumazet@...il.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: debugging TCP stalls on high-speed wifi

On Thu, 2019-12-12 at 20:15 -0800, Justin Capella wrote:
> Could TCP window size (waiting for ACKnowledgements) be a contributing factor?

Quite possibly, although even with a large number of flows?

I thought we had a TCP_CHRONO_ for it but we don't, maybe I'll try to
add one for debug.

johannes