From: Paolo Abeni <pabeni@redhat.com>
To: netdev@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Eric Dumazet <edumazet@google.com>
Subject: [PATCH net-next 0/6] sk_buff: optimize GRO for the common case
Date: Wed, 28 Jul 2021 18:23:58 +0200 [thread overview]
Message-ID: <cover.1627405778.git.pabeni@redhat.com> (raw)
This is a trimmed down revision of "sk_buff: optimize layout for GRO",
specifically dropping the changes to the sk_buff layout[1].
This series tries to accomplish 2 goals:
- optimize the GRO stage for the most common scenario, avoiding a bunch
of conditional and some more code
- let owned skbs entering the GRO engine, allowing backpressure in the
veth GRO forward path.
A new sk_buff flag (!!!) is introduced and maintained for GRO's sake.
Such field uses an existing hole, so there is no change to the sk_buff
size.
[1] two main reasons:
- move skb->inner_ field requires some extra care, as some in kernel
users access and the fields regardless of skb->encapsulation.
- extending secmark size clash with ct and nft uAPIs
address the all above is possible, I think, but for sure not in a single
series.
Paolo Abeni (6):
sk_buff: introduce 'slow_gro' flags
sk_buff: track dst status in slow_gro
sk_buff: track extension status in slow_gro
net: optimize GRO for the common case.
skbuff: allow 'slow_gro' for skb carring sock reference
veth: use skb_prepare_for_gro()
drivers/net/veth.c | 2 +-
include/linux/skbuff.h | 6 ++++++
include/net/dst.h | 2 ++
include/net/sock.h | 9 +++++++++
net/core/dev.c | 32 ++++++++++++++++++++++++--------
net/core/skbuff.c | 27 ++++++++++++++++++++-------
6 files changed, 62 insertions(+), 16 deletions(-)
--
2.26.3
next reply other threads:[~2021-07-28 16:24 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-28 16:23 Paolo Abeni [this message]
2021-07-28 16:23 ` [PATCH net-next 1/6] sk_buff: introduce 'slow_gro' flags Paolo Abeni
2021-07-28 16:24 ` [PATCH net-next 2/6] sk_buff: track dst status in slow_gro Paolo Abeni
2021-07-30 11:08 ` Jakub Kicinski
2021-07-30 13:08 ` Paolo Abeni
2021-07-28 16:24 ` [PATCH net-next 3/6] sk_buff: track extension " Paolo Abeni
2021-07-28 16:24 ` [PATCH net-next 4/6] net: optimize GRO for the common case Paolo Abeni
2021-07-28 16:24 ` [PATCH net-next 5/6] skbuff: allow 'slow_gro' for skb carring sock reference Paolo Abeni
2021-07-28 16:24 ` [PATCH net-next 6/6] veth: use skb_prepare_for_gro() Paolo Abeni
2021-07-29 11:20 ` [PATCH net-next 0/6] sk_buff: optimize GRO for the common case patchwork-bot+netdevbpf
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