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Date: Tue, 1 May 2012 03:14:36 -0700 From: Dave Taht <dave.taht@...il.com> To: Hagen Paul Pfeifer <hagen@...u.net> Cc: Eric Dumazet <eric.dumazet@...il.com>, David Miller <davem@...emloft.net>, netdev <netdev@...r.kernel.org>, Tom Herbert <therbert@...gle.com>, Neal Cardwell <ncardwell@...gle.com>, Stephen Hemminger <shemminger@...tta.com> Subject: Re: [PATCH net-next] netem: add ECN capability On Tue, May 1, 2012 at 2:28 AM, Hagen Paul Pfeifer <hagen@...u.net> wrote: > Nice! Applause as well! While this is something of a fork of this discussion, I would rather like to resurrect a variant of the old 'time in queue' patch... http://patchwork.ozlabs.org/patch/125329/ As best as I recall we'd run into trouble with combining things like netem and complex qdiscs, because we had basically overrun the size of the control block. And then there was a long discussion of all that and I forget if any conclusion was reached. An alternative to reducing the length of the control block was to find some way to leverage this sanely in the qdisc layer... #define HAVE_HW_TIME_STAMP /** * struct skb_shared_hwtstamps - hardware time stamps * @hwtstamp: hardware time stamp transformed into duration * since arbitrary point in time * @syststamp: hwtstamp transformed to system time base * -- Dave Täht SKYPE: davetaht US Tel: 1-239-829-5608 http://www.bufferbloat.net -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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