a5beddd800
Primarily, it is intended as a way for the mempool driver to provide additional information on how it lays up objects inside the mempool. Signed-off-by: Artem V. Andreev <artem.andreev@oktetlabs.ru> Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com> Acked-by: Olivier Matz <olivier.matz@6wind.com>