netdev - RE: [PATCH/RFC] ipv6: fib: Drop cached routes with dead neighbours on fib GC

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Date:	Fri, 11 Jan 2013 08:57:09 -0000
From:	"David Laight" <David.Laight@...LAB.COM>
To:	"David Miller" <davem@...emloft.net>, <roland@...nel.org>
Cc:	<netdev@...r.kernel.org>, <roland@...estorage.com>
Subject: RE: [PATCH/RFC] ipv6: fib: Drop cached routes with dead neighbours on fib GC

> Another reason we must make ipv6 like ipv4, which looks up neighbours
> on demand at packet output time rather than caching them in the route
> entries.

Presumable the neighbour could be left cached in the route entry
provided the code checks that the cached entry is still valid
and does a relookup if not (rather than a send-blackhole).

	David



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