27/04/2018 19:22, Yongseok Koh: > This patch introduces a new way of attaching an external buffer to a mbuf. > > Attaching an external buffer is quite similar to mbuf indirection in > replacing buffer addresses and length of a mbuf, but a few differences: > - When an indirect mbuf is attached, refcnt of the direct mbuf would be > 2 as long as the direct mbuf itself isn't freed after the attachment. > In such cases, the buffer area of a direct mbuf must be read-only. But > external buffer has its own refcnt and it starts from 1. Unless > multiple mbufs are attached to a mbuf having an external buffer, the > external buffer is writable. > - There's no need to allocate buffer from a mempool. Any buffer can be > attached with appropriate free callback. > - Smaller metadata is required to maintain shared data such as refcnt. > > Signed-off-by: Yongseok Koh <ys...@mellanox.com> > Acked-by: Konstantin Ananyev <konstantin.anan...@intel.com> > Acked-by: Olivier Matz <olivier.m...@6wind.com> > Acked-by: Andrew Rybchenko <arybche...@solarflare.com>
Series applied, thanks
