From: Eric Dumazet <edumazet@google.com>
Date: Thu, 6 Jun 2013 21:53:16 +0000 (-0700)
Subject: net_sched: htb: do not setup default rate estimators
X-Git-Tag: v3.11-rc1~16^2~122
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=64153ce0a7b61b2a5cacb01805cbf670142339e9;p=pandora-kernel.git

net_sched: htb: do not setup default rate estimators

With a thousand htb classes, est_timer() spends ~5 million cpu cycles
and throws out cpu cache, because each htb class has a default
rate estimator (est 4sec 16sec).

Most users do not use default rate estimators, so switch htb
to not setup ones.

Add a module parameter (htb_rate_est) so that users relying
on this default rate estimator can revert the behavior.

echo 1 >/sys/module/sch_htb/parameters/htb_rate_est

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

Reading git-diff-tree failed