netdev - [PATCH rfc v2 0/5] add elevated refcnt support for page pool

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Date:   Sat, 10 Jul 2021 15:43:17 +0800
From:   Yunsheng Lin <linyunsheng@...wei.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>
CC:     <alexander.duyck@...il.com>, <linux@...linux.org.uk>,
        <mw@...ihalf.com>, <linuxarm@...neuler.org>,
        <yisen.zhuang@...wei.com>, <salil.mehta@...wei.com>,
        <thomas.petazzoni@...tlin.com>, <hawk@...nel.org>,
        <ilias.apalodimas@...aro.org>, <ast@...nel.org>,
        <daniel@...earbox.net>, <john.fastabend@...il.com>,
        <akpm@...ux-foundation.org>, <peterz@...radead.org>,
        <will@...nel.org>, <willy@...radead.org>, <vbabka@...e.cz>,
        <fenghua.yu@...el.com>, <guro@...com>, <peterx@...hat.com>,
        <feng.tang@...el.com>, <jgg@...pe.ca>, <mcroce@...rosoft.com>,
        <hughd@...gle.com>, <jonathan.lemon@...il.com>, <alobakin@...me>,
        <willemb@...gle.com>, <wenxu@...oud.cn>, <cong.wang@...edance.com>,
        <haokexin@...il.com>, <nogikh@...gle.com>, <elver@...gle.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <bpf@...r.kernel.org>
Subject: [PATCH rfc v2 0/5] add elevated refcnt support for page pool

This patchset adds elevated refcnt support for page pool
and enable skb's page frag recycling based on page pool
in hns3 drvier.

RFC v2:
1. Split patch 1 to more reviewable one.
2. Repurpose the lower 12 bits of the dma address to store the
   pagecnt_bias as suggested by Alexander.
3. support recycling to pool->alloc for elevated refcnt case
   too.

Yunsheng Lin (5):
  page_pool: keep pp info as long as page pool owns the page
  page_pool: add interface for getting and setting pagecnt_bias
  page_pool: add page recycling support based on elevated refcnt
  page_pool: support page frag API for page pool
  net: hns3: support skb's frag page recycling based on page pool

 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c |  79 ++++++++++-
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.h |   3 +
 drivers/net/ethernet/marvell/mvneta.c           |   6 +-
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c |   2 +-
 drivers/net/ethernet/ti/cpsw.c                  |   2 +-
 drivers/net/ethernet/ti/cpsw_new.c              |   2 +-
 include/linux/skbuff.h                          |   4 +-
 include/net/page_pool.h                         |  50 +++++--
 net/core/page_pool.c                            | 172 ++++++++++++++++++++----
 9 files changed, 266 insertions(+), 54 deletions(-)

-- 
2.7.4