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Date: Mon, 28 Sep 2015 21:44:34 -0700
From: Stephen Hemminger <stephen@networkplumber.org>
To: Srikanth Akula <srikanth044@gmail.com>
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Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: [dpdk-dev] Hotplug
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On Mon, 28 Sep 2015 21:12:50 -0700
Srikanth Akula <srikanth044@gmail.com> wrote:

> Hello ,
> 
> I am trying to write an application based on DPDK port hotplug feature . My
> requirement is to get an event when a new PCI devices gets added to the
> system on the go.
> 
> Do we have any in-built mechanism in DPDK (UIO/e1000/vfio drivers ) that i
> can use to get notifications when a new device gets added . I know the
> alternatives such as inotify etc .
> 
> But i am more interested to get equivalent support in dpdk drivers .
> 
> Please let me know .
> 
> Srikanth

Implementing hotplug requires integration with the OS more than any additional
DPDK support. What the Brocade vRouter does is leverage the existing Linux
udev infrastructure to send a message to the router application which then
initializes and sets up the new hardware. Most of the DPDK changes are upstream
already and involve being able to dynamically add ports on the fly.