On Fri, 16 Jun 2023 20:41:45 +0200 Jesper Dangaard Brouer wrote: > > This is a sort-of. One thing that has come up as of late is that all > > this stuff is being moved over to folios anyway and getting away from > > pages. In addition I am not sure how often we are having to take this > > path as I am not sure how many non-Tx frames end up having to have > > fragments added to them. For something like veth it might be more > > common though since Tx becomes Rx in this case. > > I'm thinking, that is it very unlikely that XDP have modified the > fragments. So, why are we allocating and copying the fragments? > Wouldn't it be possible for this veth code to bump the refcnt on these > fragments? (maybe I missed some detail). They may be page cache pages, AFAIU.
