Re: [PATCH v2 net-next] net: ipv6: Add a sysctl to make optimistic addresses useful candidates

(resending; sorry for the dup; my text mail setting was defeated)-:

On Wed, Oct 29, 2014 at 6:34 PM, Erik Kline [off-list ref] wrote:

Hannes,

Given that we spoke about this reduction in the number of netlink messages
earlier, do you still think it's an issue?

The end result here is that for listeners on netlink sockets on systems that
(a) have optimistic dad built-in, (b) have optimistic dad enabled, and (c)
have use_optimistic set: they'll 2 notifications (with different flags) for
automatically added addresses on these interfaces.

(Personally, given that we appear to send an RTM_NEWADDR when the address
gets deprecated (I think), I think sending one on every flag change of
interest is in keeping with existing behaviour.)

On Wed Oct 29 2014 at 12:15:59 AM Lorenzo Colitti [off-list ref]
wrote:

quoted

On Tue, Oct 28, 2014 at 6:11 PM, Erik Kline [off-list ref] wrote:

quoted

Add a sysctl that causes an interface's optimistic addresses
to be considered equivalent to other non-deprecated addresses
for source address selection purposes.  Preferred addresses
will still take precedence over optimistic addresses, subject
to other ranking in the source address selection algorithm.
...
Signed-off-by: Erik Kline <redacted>

Acked-by: Lorenzo Colitti <redacted>