linux-kernel - [RFC 0/3] support non-frag page for page_pool_alloc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 16 May 2023 20:47:58 +0800
From:   Yunsheng Lin <linyunsheng@...wei.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Yunsheng Lin <linyunsheng@...wei.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, <bpf@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: [RFC 0/3] support non-frag page for page_pool_alloc_frag()

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@kernel.org/

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