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From: Eric Dumazet <eric.dumazet@gmail.com>
To: "David S . Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>
Cc: netdev <netdev@vger.kernel.org>, Coco Li <lixiaoyan@google.com>,
	Eric Dumazet <edumazet@google.com>,
	Eric Dumazet <eric.dumazet@gmail.com>
Subject: [PATCH v4 net-next 09/12] net: loopback: enable BIG TCP packets
Date: Fri,  6 May 2022 08:30:45 -0700	[thread overview]
Message-ID: <20220506153048.3695721-10-eric.dumazet@gmail.com> (raw)
In-Reply-To: <20220506153048.3695721-1-eric.dumazet@gmail.com>

From: Eric Dumazet <edumazet@google.com>

Set the driver limit to 512 KB per TSO ipv6 packet.

This allows the admin/user to set a GSO ipv6 limit up to this value.

Tested:

ip link set dev lo gso_ipv6_max_size 200000
netperf -H ::1 -t TCP_RR -l 100 -- -r 80000,80000 &

tcpdump shows :

18:28:42.962116 IP6 ::1 > ::1: HBH 40051 > 63780: Flags [P.], seq 3626480001:3626560001, ack 3626560001, win 17743, options [nop,nop,TS val 3771179265 ecr 3771179265], length 80000
18:28:42.962138 IP6 ::1.63780 > ::1.40051: Flags [.], ack 3626560001, win 17743, options [nop,nop,TS val 3771179265 ecr 3771179265], length 0
18:28:42.962152 IP6 ::1 > ::1: HBH 63780 > 40051: Flags [P.], seq 3626560001:3626640001, ack 3626560001, win 17743, options [nop,nop,TS val 3771179265 ecr 3771179265], length 80000
18:28:42.962157 IP6 ::1.40051 > ::1.63780: Flags [.], ack 3626640001, win 17743, options [nop,nop,TS val 3771179265 ecr 3771179265], length 0
18:28:42.962180 IP6 ::1 > ::1: HBH 40051 > 63780: Flags [P.], seq 3626560001:3626640001, ack 3626640001, win 17743, options [nop,nop,TS val 3771179265 ecr 3771179265], length 80000
18:28:42.962214 IP6 ::1.63780 > ::1.40051: Flags [.], ack 3626640001, win 17743, options [nop,nop,TS val 3771179266 ecr 3771179265], length 0
18:28:42.962228 IP6 ::1 > ::1: HBH 63780 > 40051: Flags [P.], seq 3626640001:3626720001, ack 3626640001, win 17743, options [nop,nop,TS val 3771179266 ecr 3771179265], length 80000
18:28:42.962233 IP6 ::1.40051 > ::1.63780: Flags [.], ack 3626720001, win 17743, options [nop,nop,TS val 3771179266 ecr 3771179266], length 0

Signed-off-by: Eric Dumazet <edumazet@google.com>
---
 drivers/net/loopback.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index 720394c0639b20a2fd6262e4ee9d5813c02802f1..f504dd0817092d63f0e929500ec49cfdda562c4b 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -191,6 +191,8 @@ static void gen_lo_setup(struct net_device *dev,
 	dev->netdev_ops		= dev_ops;
 	dev->needs_free_netdev	= true;
 	dev->priv_destructor	= dev_destructor;
+
+	netif_set_tso_max_size(dev, 512 * 1024);
 }
 
 /* The loopback device is special. There is only one instance
-- 
2.36.0.512.ge40c2bad7a-goog


  parent reply	other threads:[~2022-05-06 15:32 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-06 15:30 [PATCH v4 net-next 00/12] tcp: BIG TCP implementation Eric Dumazet
2022-05-06 15:30 ` [PATCH v4 net-next 01/12] net: add IFLA_TSO_{MAX_SIZE|SEGS} attributes Eric Dumazet
2022-05-06 15:30 ` [PATCH v4 net-next 02/12] ipv6: add IFLA_GSO_IPV6_MAX_SIZE Eric Dumazet
2022-05-06 20:48   ` Alexander H Duyck
2022-05-06 21:20     ` Eric Dumazet
2022-05-06 21:37       ` Alexander Duyck
2022-05-06 21:50         ` Eric Dumazet
2022-05-06 22:16           ` Alexander Duyck
2022-05-06 22:25             ` Eric Dumazet
2022-05-06 22:26             ` Jakub Kicinski
2022-05-06 22:46               ` Alexander Duyck
2022-05-06 15:30 ` [PATCH v4 net-next 03/12] tcp_cubic: make hystart_ack_delay() aware of BIG TCP Eric Dumazet
2022-05-06 15:30 ` [PATCH v4 net-next 04/12] ipv6: add struct hop_jumbo_hdr definition Eric Dumazet
2022-05-06 15:30 ` [PATCH v4 net-next 05/12] ipv6/gso: remove temporary HBH/jumbo header Eric Dumazet
2022-05-06 15:30 ` [PATCH v4 net-next 06/12] ipv6/gro: insert " Eric Dumazet
2022-05-06 15:30 ` [PATCH v4 net-next 07/12] ipv6: add IFLA_GRO_IPV6_MAX_SIZE Eric Dumazet
2022-05-06 21:06   ` Alexander H Duyck
2022-05-06 21:22     ` Eric Dumazet
2022-05-06 22:01       ` Alexander Duyck
2022-05-06 22:08         ` Eric Dumazet
2022-05-09 18:17       ` [PATCH 0/2] Replacements for patches 2 and 7 in Big TCP series Alexander Duyck
2022-05-09 18:17         ` [PATCH 1/2] net: Allow gso_max_size to exceed 65536 Alexander Duyck
2022-05-09 18:17         ` [PATCH 2/2] net: Allow gro_max_size " Alexander Duyck
2022-05-09 18:54         ` [PATCH 0/2] Replacements for patches 2 and 7 in Big TCP series Eric Dumazet
2022-05-09 20:21           ` Alexander H Duyck
2022-05-09 20:31             ` Eric Dumazet
2022-05-09 21:05               ` Alexander Duyck
2022-05-06 15:30 ` [PATCH v4 net-next 08/12] ipv6: Add hop-by-hop header to jumbograms in ip6_output Eric Dumazet
2022-05-06 15:30 ` Eric Dumazet [this message]
2022-05-06 15:30 ` [PATCH v4 net-next 10/12] veth: enable BIG TCP packets Eric Dumazet
2022-05-06 22:33   ` Jakub Kicinski
2022-05-06 15:30 ` [PATCH v4 net-next 11/12] mlx4: support " Eric Dumazet
2022-05-06 15:30 ` [PATCH v4 net-next 12/12] mlx5: " Eric Dumazet
2022-05-06 22:34   ` Jakub Kicinski
2022-05-07  0:32     ` Eric Dumazet
2022-05-07  1:54       ` Jakub Kicinski
2022-05-07  1:54         ` Jakub Kicinski
2022-05-07  2:10         ` Eric Dumazet
2022-05-07  2:37           ` Jakub Kicinski
2022-05-07  2:43             ` Eric Dumazet
2022-05-07  7:16               ` Kees Cook
2022-05-07  7:23             ` Kees Cook
2022-05-07  6:57         ` Kees Cook
2022-05-07  7:46         ` Kees Cook
2022-05-07 11:19           ` Eric Dumazet
2022-05-09  8:05             ` David Laight
2022-05-09 23:20             ` Kees Cook

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