netdev - Bypass qdiscs?

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Message-ID: <CAGXJAmy-0_GV7pR5_3NNArWZumunRijHeSJnY=VEf8RjmegZZw@mail.gmail.com>
Date: Fri, 3 Nov 2023 16:55:35 -0700
From: John Ousterhout <ouster@...stanford.edu>
To: netdev@...r.kernel.org
Cc: John Ousterhout <ouster@...stanford.edu>
Subject: Bypass qdiscs?

Is there a way to mark an skb (or its socket) before invoking
ip_queue_xmit/ip6_xmit so that the packet will bypass the qdiscs and
be transmitted immediately? Is doing such a thing considered bad
practice?

(Homa has its own packet scheduling mechanism so the qdiscs are just
getting in the way and adding delays)

-John-