On 4/12/24 6:55 AM, 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. > > Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx> > --- > include/linux/skbuff.h | 2 ++ > net/core/skbuff.c | 20 ++++++++++++++------ > 2 files changed, 16 insertions(+), 6 deletions(-) > Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>
