In [1], there is a use case 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 way for user to fail back to non-frag page depending on the user's request. 1. https://patchwork.kernel.org/project/netdevbpf/patch/d3ae6bd3537fbce379382ac6a42f67e22f27ece2.1683896626.git.lorenzo@xxxxxxxxxx/ Yunsheng Lin (3): page_pool: unify frag page and non-frag page handling page_pool: support non-frag page for page_pool_alloc_frag() page_pool: introduce 'struct page_pool_frag' .../net/ethernet/hisilicon/hns3/hns3_enet.c | 16 +++--- drivers/net/wireless/mediatek/mt76/mt76.h | 9 ++-- include/net/page_pool.h | 51 ++++++++++++++----- net/core/page_pool.c | 45 +++++++++++----- 4 files changed, 86 insertions(+), 35 deletions(-) -- 2.33.0
