Re: [PATCH bpf-next 05/11] bpf: avoid retpoline for lookup/update/delete calls on maps

On Sun, May 27, 2018 at 5:43 PM, Daniel Borkmann wrote: > While some of the BPF map lookup helpers provide a ->map_gen_lookup() > callback for inlining the map lookup altogether it is not available > for every map, so the remaining ones have to call bpf_map_lookup_elem() > helper which does a disp

Re: [PATCH bpf-next 05/11] bpf: avoid retpoline for lookup/update/delete calls on maps

On Mon, 28 May 2018 02:43:38 +0200 Daniel Borkmann wrote: > While some of the BPF map lookup helpers provide a ->map_gen_lookup() > callback for inlining the map lookup altogether it is not available > for every map, so the remaining ones have to call bpf_map_lookup_elem() > helper which does a d

[PATCH bpf-next 05/11] bpf: avoid retpoline for lookup/update/delete calls on maps

While some of the BPF map lookup helpers provide a ->map_gen_lookup() callback for inlining the map lookup altogether it is not available for every map, so the remaining ones have to call bpf_map_lookup_elem() helper which does a dispatch to map->ops->map_lookup_elem(). In times of retpolines, this