Pavel Begunkov wrote: > At the moment an skb can only have one ubuf_info associated with it, > which might be a performance problem for zerocopy sends in cases like > TCP via io_uring. Add a callback for assigning ubuf_info to skb, this > way we will implement smarter assignment later like linking ubuf_info > together. > > Note, it's an optional callback, which should be compatible with > skb_zcopy_set(), that's because the net stack might potentially decide > to clone an skb and take another reference to ubuf_info whenever it > wishes. Also, a correct implementation should always be able to bind to > an skb without prior ubuf_info, otherwise we could end up in a situation > when the send would not be able to progress. > > Reviewed-by: Jens Axboe <axboe@xxxxxxxxx> > Reviewed-by: David Ahern <dsahern@xxxxxxxxxx> > Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx> Reviewed-by: Willem de Bruijn <willemb@xxxxxxxxxx>
