From: Eric Dumazet <edumazet@google.com>
Date: Tue, 11 Mar 2014 00:11:42 +0000 (-0700)
Subject: pkt_sched: do not use rcu in tc_dump_qdisc()
X-Git-Tag: v3.15-rc1~113^2~183^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=15dc36ebbbea7da35fff2c51b620c8333fc87528;p=pandora-kernel.git

pkt_sched: do not use rcu in tc_dump_qdisc()

Like all rtnetlink dump operations, we hold RTNL in tc_dump_qdisc(),
so we do not need to use rcu protection to protect list of netdevices.

This will allow preemption to occur, thus reducing latencies.
Following patch adds explicit cond_resched() calls.

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