Re: [PATCH net v3 2/3] ipv6: ignore dst hint for multipath routes

On Mon, Aug 28, 2023 at 01:32:20PM +0200, Sriram Yagnaraman wrote:

Route hints when the nexthop is part of a multipath group causes packets in the same receive batch to be sent to the same nexthop irrespective of the multipath hash of the packet. So, do not extract route hint for packets whose destination is part of a multipath group.

A new SKB flag IP6SKB_MULTIPATH is introduced for this purpose, set the flag when route is looked up in fib6_select_path() and use it in ip6_can_use_hint() to check for the existence of the flag.

Fixes: 197dbf24e360 ("ipv6: introduce and uses route look hints for list input.") Signed-off-by: Sriram Yagnaraman sriram.yagnaraman@est.tech

Reviewed-by: Ido Schimmel idosch@nvidia.com