netdev - [PATCH net-next v2 0/4] net: Avoid the memory waste in some Ethernet drivers

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Date:   Sun, 31 Jan 2021 15:44:22 +0800
From:   Kevin Hao <haokexin@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     netdev@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH net-next v2 0/4] net: Avoid the memory waste in some Ethernet drivers

Hi,

v2:
  - Inline page_frag_alloc() and {netdev,napi}_alloc_frag()
  - Adopt Vlastimil's suggestion and add his Acked-by

In the current implementation of napi_alloc_frag(), it doesn't have any
align guarantee for the returned buffer address. We would have to use
some ugly workarounds to make sure that we can get a align buffer
address for some Ethernet drivers. This patch series tries to introduce
some helper functions to make sure that an align buffer is returned.
Then we can drop the ugly workarounds and avoid the unnecessary memory
waste.

Kevin Hao (4):
  mm: page_frag: Introduce page_frag_alloc_align()
  net: Introduce {netdev,napi}_alloc_frag_align()
  net: octeontx2: Use napi_alloc_frag_align() to avoid the memory waste
  net: dpaa2: Use napi_alloc_frag_align() to avoid the memory waste

 .../net/ethernet/freescale/dpaa2/dpaa2-eth.c  |  3 +--
 .../marvell/octeontx2/nic/otx2_common.c       |  3 +--
 include/linux/gfp.h                           | 12 +++++++--
 include/linux/skbuff.h                        | 22 ++++++++++++++--
 mm/page_alloc.c                               |  8 +++---
 net/core/skbuff.c                             | 25 +++++++------------
 6 files changed, 46 insertions(+), 27 deletions(-)

-- 
2.29.2