> 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.
ack, I think we could add a percpu dedicated pointer for it.
Regards,
Lorenzo
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