On Thu, Dec 14, 2023 at 3:30 PM Lorenzo Bianconi <lorenzo@xxxxxxxxxx> wrote:
>
> Allocate percpu page_pools in softnet_data.
> Moreover add cpuid filed in page_pool struct in order to recycle the
> page in the page_pool "hot" cache if napi_pp_put_page() is running on
> the same cpu.
> This is a preliminary patch to add xdp multi-buff support for xdp running
> in generic mode.
>
> Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
> ---
> include/linux/netdevice.h | 1 +
> include/net/page_pool/helpers.h | 5 +++++
> include/net/page_pool/types.h | 1 +
> net/core/dev.c | 39 ++++++++++++++++++++++++++++++++-
> net/core/page_pool.c | 5 +++++
> net/core/skbuff.c | 5 +++--
> 6 files changed, 53 insertions(+), 3 deletions(-)
>
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index 1b935ee341b4..30b6a3f601fe 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -3319,6 +3319,7 @@ struct softnet_data {
> int defer_count;
> int defer_ipi_scheduled;
> struct sk_buff *defer_list;
> + struct page_pool *page_pool;
> call_single_data_t defer_csd;
> };
This field should be put elsewhere, not in this contended cache line.
