From: Paolo Abeni <pabeni@redhat.com>
To: Saeed Mahameed <saeedm@nvidia.com>,
Eric Dumazet <eric.dumazet@gmail.com>
Cc: "David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, netdev <netdev@vger.kernel.org>,
Alexander Duyck <alexanderduyck@fb.com>,
Coco Li <lixiaoyan@google.com>,
Eric Dumazet <edumazet@google.com>,
Tariq Toukan <tariqt@nvidia.com>,
Leon Romanovsky <leon@kernel.org>
Subject: Re: [PATCH v6 net-next 13/13] mlx5: support BIG TCP packets
Date: Thu, 12 May 2022 11:02:19 +0200 [thread overview]
Message-ID: <51bc118ff452c42fef489818422f278ab79e6dd4.camel@redhat.com> (raw)
In-Reply-To: <20220512084023.tgjcecnu6vfuh7ry@LT-SAEEDM-5760.attlocal.net>
On Thu, 2022-05-12 at 01:40 -0700, Saeed Mahameed wrote:
> On 09 May 20:32, Eric Dumazet wrote:
> > From: Coco Li <lixiaoyan@google.com>
> >
> > mlx5 supports LSOv2.
> >
> > IPv6 gro/tcp stacks insert a temporary Hop-by-Hop header
> > with JUMBO TLV for big packets.
> >
> > We need to ignore/skip this HBH header when populating TX descriptor.
> >
>
> Sorry i didn't go through all the documentations or previous discussions,
> please bare with me, so why not clear HBH just before calling the
> driver xmit ndo ?
I guess this way is more efficient: the driver copies IP hdr and TCP
hdr directly in the correct/final location into the tx descriptor,
otherwise the caller would have to memmove L2/L3 just before the driver
copies them again.
>
> Or if HBH has to stick,
My understanding is that this is not the case.
Cheers,
Paolo
next prev parent reply other threads:[~2022-05-12 9:02 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-10 3:32 [PATCH v6 net-next 00/13] tcp: BIG TCP implementation Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 01/13] net: add IFLA_TSO_{MAX_SIZE|SEGS} attributes Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 02/13] net: allow gso_max_size to exceed 65536 Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 03/13] net: limit GSO_MAX_SIZE to 524280 bytes Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 04/13] tcp_cubic: make hystart_ack_delay() aware of BIG TCP Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 05/13] ipv6: add struct hop_jumbo_hdr definition Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 06/13] ipv6/gso: remove temporary HBH/jumbo header Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 07/13] ipv6/gro: insert " Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 08/13] net: allow gro_max_size to exceed 65536 Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 09/13] ipv6: Add hop-by-hop header to jumbograms in ip6_output Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 10/13] net: loopback: enable BIG TCP packets Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 11/13] veth: " Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 12/13] mlx4: support " Eric Dumazet
2022-05-10 3:32 ` [PATCH v6 net-next 13/13] mlx5: " Eric Dumazet
2022-05-12 8:40 ` Saeed Mahameed
2022-05-12 9:02 ` Paolo Abeni [this message]
2022-05-13 4:29 ` Saeed Mahameed
2022-05-13 4:34 ` Eric Dumazet
2022-05-13 5:49 ` Saeed Mahameed
2022-05-13 13:05 ` Eric Dumazet
2022-05-13 17:04 ` Jakub Kicinski
2022-05-13 17:12 ` Eric Dumazet
2022-05-10 19:49 ` [PATCH v6 net-next 00/13] tcp: BIG TCP implementation Alexander H Duyck
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