On Fri, Feb 04, 2011 at 03:52:43PM -0800, Yongqiang Liu wrote:
> Now there is an interesting problem with ./ovs-dpctl show command.
> It will silently create many dpx devices in /dev/net. 

This is true.

> 4.  but if there in argument dp0, it has a problem: it creates extra 254
> devices in /dev/net/
> # ./ovs-dpctl show

Do you mean, if there is *no* argument dp0?  That is what your example
shows.

This is because the "show" command without any argument scans for every
possible datapath.  There are 256 possible datapaths numbered 0 through
255, so it has to create a device for each one in order to try to open
it.

It's not normally a problem.  Does it cause a problem for you?

At any rate, the current "master" branch in OVS does not create any
devices at all.  It uses Netlink instead.

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