On Fri, Jul 26, 2019 at 9:06 AM Toke Høiland-Jørgensen <t...@redhat.com> wrote: > > This series adds a new map type, devmap_hash, that works like the existing > devmap type, but using a hash-based indexing scheme. This is useful for the > use > case where a devmap is indexed by ifindex (for instance for use with the > routing > table lookup helper). For this use case, the regular devmap needs to be sized > after the maximum ifindex number, not the number of devices in it. A > hash-based > indexing scheme makes it possible to size the map after the number of devices > it > should contain instead. > > This was previously part of my patch series that also turned the regular > bpf_redirect() helper into a map-based one; for this series I just pulled out > the patches that introduced the new map type. > > Changelog: > > v5: > > - Dynamically set the number of hash buckets by rounding up max_entries to the > nearest power of two (mirroring the regular hashmap), as suggested by > Jesper.
fyi I'm waiting for Jesper to review this new version.
