Re: [PATCH net-next v2 0/7] net: unify dst caching for tunnel devices

[David Miller <davem@davemloft.net>]

From: Paolo Abeni <pabeni@redhat.com>
Date: Fri, 12 Feb 2016 15:43:52 +0100

> This patch series try to unify the dst cache implementations currently
> present in the kernel, namely in ip_tunnel.c and ip6_tunnel.c, introducing a
> new generic implementation, replacing the existing ones, and then using
> the new implementation in other tunnel devices which currently lack it.
> 
> The new dst implementation is compiled, as built-in, only if any device using
> it is enabled.
> 
> Caching the dst for the tunnel remote address gives small, but measurable,
> performance improvement when tunneling over ipv4 (in the 2%-4% range) and
> significant ones when tunneling over ipv6 (roughly 60% when no
> fragmentation/segmentation take place and the tunnel local address
> is not specified).
> 
> v2:
> - move the vxlan dst_cache usage inside the device lookup functions
> - fix usage after free for lwt tunnel moving the dst cache storage inside
>   the dst_metadata,
> - sparse codying style cleanup

Series applied, thanks for doing this work as it is a major improvement.