From: Jesper Dangaard Brouer <hawk@comx.dk>
Date: Mon, 16 Jun 2008 23:38:33 +0000 (-0700)
Subject: pkt_sched: HTB scheduler, change default hysteresis mode to off.
X-Git-Tag: v2.6.26-rc7~20^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f9ffcedddba5b2fc5ab16ef08bca55af8be2717e;p=pandora-kernel.git

pkt_sched: HTB scheduler, change default hysteresis mode to off.

The HTB hysteresis mode reduce the CPU load, but at the
cost of scheduling accuracy.

On ADSL links (512 kbit/s upstream), this inaccuracy introduce
significant jitter, enought to disturbe VoIP.  For details see my
masters thesis (http://www.adsl-optimizer.dk/thesis/), chapter 7,
section 7.3.1, pp 69-70.

Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Acked-by: Martin Devera <devik@cdi.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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