netdev - Multiple Txqs with One Qdisc

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Message-ID: <CAAmHdhyA+JZrdFcwsWAzQOcSA6EUbWu4h5YcOA0vc2y01ZEBkg@mail.gmail.com>
Date:   Tue, 25 Apr 2017 21:46:41 -0700
From:   Michael Ma <make0818@...il.com>
To:     Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Multiple Txqs with One Qdisc

Hi -

As I mentioned in a previous thread, we're implementing a qdisc
similar to mqprio which can associate multiple txqs to one qdisc, so
that we can work around the root qdisc bottleneck. I think this should
be in general fine since without MQ, root qdisc is associated with
multiple txqs anyway. However we encountered kernel panic as I
mentioned in the "corrupted skb" thread.

Any thought on potential issue of doing this? I'm asking this because
mqprio only associates one txq with one qdisc which I think must have
been done this way for a reason.

Would appreciate if anyone can shed some light on this.

Thanks,
Michael