Subject: Re: [PATCH] ifb: add multi-queue support

From: Patrick McHardy <[email-masked]>
Date: Tue, 10 Nov 2009 11:29:00 +0100

Changli Gao wrote:
> ifb: add multi-queue support
> 
> Add multi-queue support, and one kernel thread is created for per queue.
> It can used to emulate multi-queue NIC in software, and distribute work
> among CPUs.
> gentux linux # modprobe ifb numtxqs=2
> gentux linux # ifconfig ifb0 up
> gentux linux # pgrep ifb0
> 18508
> 18509
> gentux linux # taskset -p 1 18508
> pid 18508's current affinity mask: 3
> pid 18508's new affinity mask: 1
> gentux linux # taskset -p 2 18509
> pid 18509's current affinity mask: 3
> pid 18509's new affinity mask: 2
> gentux linux # tc qdisc add dev br0 ingress
> gentux linux # tc filter add dev br0 parent ffff: protocol ip basic
> action mirred egress redirect dev ifb0

I'm not sure how this will help, ifb device transmission is
still serialized by the ingress queue lock and the mirred lock.