netdev - Re: [PATCH net-next 4/4] net/sched: act_mirred: Implement ingress actions

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Message-ID: <20160925183136.GA3307@breakpoint.cc>
Date:   Sun, 25 Sep 2016 20:31:36 +0200
From:   Florian Westphal <fw@...len.de>
To:     Shmulik Ladkani <shmulik.ladkani@...il.com>
Cc:     Jamal Hadi Salim <jhs@...atatu.com>,
        "David S. Miller" <davem@...emloft.net>,
        WANG Cong <xiyou.wangcong@...il.com>,
        Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
        Florian Westphal <fw@...len.de>,
        Daniel Borkmann <daniel@...earbox.net>
Subject: Re: [PATCH net-next 4/4] net/sched: act_mirred: Implement ingress
 actions

Shmulik Ladkani <shmulik.ladkani@...il.com> wrote:
> We can later address any loop-detection improvements in mirred.
> WDYT?

You can address this after fixing infamous spinlock recursion hard
lockup (which has existed forever):

tc qdisc add dev eth0 root handle 1: prio
tc filter add dev eth0 parent 1: protocol ip u32 match u32 0 0 flowid
1:2 action mirred egress redirect dev eth0

(only do this on toy vm)