Re: [patch v4, kernel version 3.2.1] net/ipv4/ip_gre: Ethernetmultipoint GRE over IP

[Jesse Gross]

On Fri, Jan 27, 2012 at 2:54 AM, Joseph Glanville
<joseph.glanville@xxxxxxxxxxxxxx> wrote:
> Under pathological load OVS suffers in benchmarks, continual
> establishment of new flows is really not good for it - I haven't
> observed this personally though.
> It does however worry me that this could be used as a viable DoS.. I
> don't really know what could be done to mitigate this however.

OVS allows each input port to have a separate genl socket associated
with it for the purpose of sending flow misses to userspace.
Currently userspace uses this to round-robin around these sockets when
handling flow setup requests in order to prevent one port from DoSing
the others.
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