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Harald Welte laforge at gnumonks.orgHi Nicolas, On Wed, Aug 26, 2020 at 09:47:54AM +0200, Nicolas Dichtel wrote: > > Sending (unsolicited) notifications about all of those seems quite heavyweight to me. > > There is no 'unsolicited' notifications with this patch. Notifications are sent > only if a userspace application has subscribed to the gtp mcast group. > ip routes or conntrack entries are notified in the same way and there could a > lot of them also (more than 100k conntrack entries for example). Ok, thanks for reminding me of that. However, even if those events are not sent/multicasted, it still looks like the proposed patch is unconditionally allocating a netlink message and filling it with information about the PDP. That alone looks like adding significant overhead to every user - even the majority of current use cases where nobody is listening/subscribing to that multicast group. Wouldn't it make sense to only allocate + fill those messages if we actually knew a subscriber existed? -- - Harald Welte <laforge at gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)