Re: flow director and packet ordering

From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Sun, 5 Jul 2009 12:19:55 +0800

David Miller [off-list ref] wrote:

quoted

In the meantime you cannot switch the RX queue mapping without
introducing reordering.

So my original fears and doubts still stand :-)

Methinks this whole idea is doomed.  The fact is as long as there
are more sockets than queues, then you can have two sockets pull
the same queue in different directions and there's nothing you can
do about that.

That's my bit of uncertainty for you :)

Flows map to queues, queues don't move.  Rather the mapping between
flows and queues changes dynamically.