[ovs-dev] [PATCH 16/16] Implement learned flow deletion.

[Thomas Graf]

On 06/05/14 at 10:02pm, Ben Pfaff wrote:
> When a flow with a "learn" action is deleted, one often wants the flows
> that it created (the "learned flows") to be deleted as well.  This commit
> makes that possible.
> 
> I am aware of a race condition that could lead to a learned flow not being
> properly deleted.  Suppose thread A deletes a flow with a "learn" action.
> Meanwhile, thread B obtains the actions for this flow and translates and
> executes them.  Thread B could obtain the actions for the flow before it is
> deleted, but execute them after the "learn" flow and its learned flows are
> deleted.  The result is that the flow created by thread B persists despite
> its "learn" flow having been deleted.  This race can and should be fixed,
> but I think that this commit is worth reviewing without it.

Code looks good aside from the race condition. Happy to provide my
ACK for the code as-is

Acked-by: Thomas Graf <tgraf at suug.ch>