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SubjectRe: unregister_netdevice: waiting for DEV to become free (2)

Hello,

On Mon, 20 Aug 2018, Cong Wang wrote:

> For the one I look into, dst_cache doesn't matter, because the xmit
> path doesn't even use tunnel dst_cache at all, and it is ip6tnl0 FB
> device, unlike this one which is tun device.

Ops, of course, it is dev tun and not ip tun...

> For the one I look into, it seems some fib6_info is not released for
> some reason. It seems to be the one created by addrconf_prefix_route(),
> which is supposed to be released by fib6_clean_tree() I think, but it
> never happens.

May be, it is not direct reference to dev but one
that is moved to loopback, like from dst, route... The repro.c
creates permanent neighbours and addresses.

Regards

--
Julian Anastasov <ja@ssi.bg>

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