[ovs-dev] [PATCH] ofproto: Increase buffer timeout from 5 seconds to 60 seconds.

Ben Pfaff blp at nicira.com
Tue May 31 21:57:15 UTC 2011


On Tue, May 31, 2011 at 02:53:45PM -0700, Jesse Gross wrote:
> On Tue, May 31, 2011 at 2:37 PM, Ben Pfaff <blp at nicira.com> wrote:
> > On Tue, May 31, 2011 at 02:33:12PM -0700, Jesse Gross wrote:
> >> On Tue, May 31, 2011 at 2:02 PM, Ben Pfaff <blp at nicira.com> wrote:
> >> > When Open vSwitch sends (part of or all of) a packet to the controller, it
> >> > keeps a copy around for a while, so that if the controller wants to send
> >> > that packet it can refer to it by a buffer index instead of having to
> >> > send back the entire contents. ??Until now, it has kept the packet around
> >> > for no more than 5 seconds, but a user reported that this is not long
> >> > enough in some conditions in the thread starting here:
> >> > ?? ??https://mailman.stanford.edu/pipermail/openflow-discuss/2011-May/002265.html
> >>
> >> The test that was performed was hardly real world and I would be
> >> surprised if packets are still useful after 5 seconds of delay (at a
> >> single switch).
> >
> > It's true. ??If you don't think this would be useful in a real-world
> > setting I'll drop it.
> 
> I'd be inclined to wait until we have a non-synthetic report of a
> problem that is solved by this.

I'll drop it for now then.



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