On Fri, 20 Oct 2023 17:59:47 +0800 Yunsheng Lin wrote: > In [1] & [2] & [3], there are usecases for veth and virtio_net > to use frag support in page pool to reduce memory usage, and it > may request different frag size depending on the head/tail > room space for xdp_frame/shinfo and mtu/packet size. When the > requested frag size is large enough that a single page can not > be split into more than one frag, using frag support only have > performance penalty because of the extra frag count handling > for frag support. > > So this patchset provides a page pool API for the driver to > allocate memory with least memory utilization and performance > penalty when it doesn't know the size of memory it need > beforehand. I don't mean to cut off the discussion, if any is still to happen. But AFAIU we have a general agreement that this is a good direction, we're at v12 already, and it's getting late in the release cycle. To give this series a chance of making v6.7 I will apply it now. If there are any unresolved concerns in a couple of days we can drop it.
