On Thu, May 19, 2016 at 11:52:05AM -0500, Ryan Moats wrote:
> Ben Pfaff <[email protected]> wrote on 05/19/2016 10:32:53 AM:
> 
> > From: Ben Pfaff <[email protected]>
> > To: Ryan Moats/Omaha/IBM@IBMUS
> > Cc: [email protected]
> > Date: 05/19/2016 10:33 AM
> > Subject: Re: [ovs-dev,v16,1/5] Change encaps_run to work incrementally
> >
> > On Thu, May 19, 2016 at 10:02:08AM -0500, Ryan Moats wrote:
> > > Ben Pfaff <[email protected]> wrote on 05/17/2016 10:13:19 PM:
> > >
> > > > From: Ben Pfaff <[email protected]>
> > > > To: Ryan Moats/Omaha/IBM@IBMUS
> > > > Cc: [email protected]
> > > > Date: 05/17/2016 10:14 PM
> > > > Subject: Re: [ovs-dev,v16,1/5] Change encaps_run to work
> incrementally
> > > >
> > > > On Mon, May 02, 2016 at 10:26:54AM -0500, Ryan Moats wrote:
> > > > > As a side effect, tunnel context is persisted.
> > > > >
> > > > > Signed-off-by: Ryan Moats <[email protected]>
> > > >
> > > > Thanks for updating this.
> > >
> > > and thanks for looking - sorry for the delayed reply (I've been
> > > doing OVN training the past couple of days)
> > >
> > > > In a couple of places, this uses hmap_first_with_hash() to find an
> > > > element in a hash table.  ovn-controller uses this method in some
> > > > special cases where the hash value is known to be unique; for
> example, I
> > > > think that it's used for a hash table where the "hash" is the
> assigned
> > > > logical datapath ID, which is a unique 32-bit (maybe shorter? I don't
> > > > recall at the moment) number.  But that trick doesn't work when the
> hash
> > > > value is really a hash.  For example, it can't be used in this code
> > > > where the hash is taken from a UUID, because there might be multiple
> > > > UUIDs with the same hash value.  It's necessary, instead, to iterate
> > > > through the items that have the desired hash value, with
> > > > HMAP_FOR_EACH_WITH_HASH, and then compare the item's full key instead
> of
> > > > just the hash.
> > >
> > > Ugh - I thought I had changed that, but when I couple this with your
> > > comments below, I'm thinking I've confused myself as to what patches
> > > I have and haven't pushed
> > >
> > > > In the process_full_encaps case, I don't see what removes tunnels
> that
> > > > are no longer needed.
> > > >
> > > > This has some TODOs and commented-out code in it, so I suspect that
> it's
> > > > not really ready for full review?
> > >
> > > As I implied above, those shouldn't be there, so now I'm suspicious if
> I've
> > > lost track of a ball that I've been juggling... Since I've got to
> rebase
> > > the rest of the patches anyway, adding this one to the list won't add
> > > that much additional effort...
> >
> > Yeah, it did seem weird, since going into it I expected that this patch
> > was ready.  I'll look forward to the next version.
> >
> 
> I've found the right code for encaps.c and re-looking at the tunnel
> update path, I'm really dubious about it being correct - I'm out this
> afternoon (CDT) for a HS graduation, but if I post just the first patch
> as an RFC how soon would it capture eyeballs?  I ask because if it will
> be a while, then I'll just work through the rest of the patches first.

I think it'll be a while, because I'm trying to get from code review
back to coding.
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