> Lorenzo Bianconi <lorenzo@xxxxxxxxxx> writes:
>
> > Introduce generic percpu page_pools allocator.
> > Moreover add page_pool_create_percpu() and 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/net/page_pool/types.h | 3 +++
> > net/core/dev.c | 40 +++++++++++++++++++++++++++++++++++
> > net/core/page_pool.c | 23 ++++++++++++++++----
> > net/core/skbuff.c | 5 +++--
> > 4 files changed, 65 insertions(+), 6 deletions(-)
> >
> > diff --git a/include/net/page_pool/types.h b/include/net/page_pool/types.h
> > index 76481c465375..3828396ae60c 100644
> > --- a/include/net/page_pool/types.h
> > +++ b/include/net/page_pool/types.h
> > @@ -128,6 +128,7 @@ struct page_pool_stats {
> > struct page_pool {
> > struct page_pool_params_fast p;
> >
> > + int cpuid;
> > bool has_init_callback;
> >
> > long frag_users;
> > @@ -203,6 +204,8 @@ struct page *page_pool_alloc_pages(struct page_pool *pool, gfp_t gfp);
> > struct page *page_pool_alloc_frag(struct page_pool *pool, unsigned int *offset,
> > unsigned int size, gfp_t gfp);
> > struct page_pool *page_pool_create(const struct page_pool_params *params);
> > +struct page_pool *page_pool_create_percpu(const struct page_pool_params *params,
> > + int cpuid);
> >
> > struct xdp_mem_info;
> >
> > diff --git a/net/core/dev.c b/net/core/dev.c
> > index cb2dab0feee0..bf9ec740b09a 100644
> > --- a/net/core/dev.c
> > +++ b/net/core/dev.c
> > @@ -153,6 +153,8 @@
> > #include <linux/prandom.h>
> > #include <linux/once_lite.h>
> > #include <net/netdev_rx_queue.h>
> > +#include <net/page_pool/types.h>
> > +#include <net/page_pool/helpers.h>
> >
> > #include "dev.h"
> > #include "net-sysfs.h"
> > @@ -442,6 +444,8 @@ static RAW_NOTIFIER_HEAD(netdev_chain);
> > DEFINE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
> > EXPORT_PER_CPU_SYMBOL(softnet_data);
> >
> > +DEFINE_PER_CPU_ALIGNED(struct page_pool *, page_pool);
>
> I think we should come up with a better name than just "page_pool" for
> this global var. In the code below it looks like it's a local variable
> that's being referenced. Maybe "global_page_pool" or "system_page_pool"
> or something along those lines?
ack, I will fix it. system_page_pool seems better, agree?
Regards,
Lorenzo
>
> -Toke
>
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