netdev - Re: [PATCH net-next v5] sched: Add dualpi2 qdisc

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Date:   Thu, 22 Aug 2019 13:33:55 -0700
From:   Dave Taht <dave.taht@...il.com>
To:     "Tilmans, Olivier (Nokia - BE/Antwerp)" 
        <olivier.tilmans@...ia-bell-labs.com>
Cc:     Eric Dumazet <eric.dumazet@...il.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Olga Albisser <olga@...isser.org>,
        "De Schepper, Koen (Nokia - BE/Antwerp)" 
        <koen.de_schepper@...ia-bell-labs.com>,
        Bob Briscoe <research@...briscoe.net>,
        Henrik Steen <henrist@...rist.net>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        "David S. Miller" <davem@...emloft.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next v5] sched: Add dualpi2 qdisc

This is vastly improved code, thank you!

1) Since we're still duking it out over the meaning of the bits - not
just the SCE thing, but as best as I can
tell (but could be wrong) the NQB idea wants to put something into the
l4s fast queue? Or is NQB supposed to
be a third queue?

In those cases, the ecn_mask should just be mask.

2) Is the intent to make the drop probability 0 by default? (10 in the
pie rfc, not mentioned in the l4s rfc as yet)

3) has this been tested on a hw mq system as yet? (10gigE is typically
64 queues)