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From: Eric Dumazet <eric.dumazet@gmail.com>
To: "David S . Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>
Cc: netdev <netdev@vger.kernel.org>,
	Eric Dumazet <edumazet@google.com>,
	Coco Li <lixiaoyan@google.com>,
	Eric Dumazet <eric.dumazet@gmail.com>
Subject: [PATCH net-next 10/15] net: loopback: enable BIG TCP packets
Date: Wed,  2 Feb 2022 17:51:35 -0800	[thread overview]
Message-ID: <20220203015140.3022854-11-eric.dumazet@gmail.com> (raw)
In-Reply-To: <20220203015140.3022854-1-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 ed0edf5884ef85bf49534ff85b7dca3d9c6aa3ab..0adb2eaaf6112d83ce067e49a4b62a28a67bfcf4 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_ipv6_max_size(dev, 512 * 1024);
 }
 
 /* The loopback device is special. There is only one instance
-- 
2.35.0.rc2.247.g8bbb082509-goog


  parent reply	other threads:[~2022-02-03  1:52 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-03  1:51 [PATCH net-next 00/15] tcp: BIG TCP implementation Eric Dumazet
2022-02-03  1:51 ` [PATCH net-next 01/15] net: add netdev->tso_ipv6_max_size attribute Eric Dumazet
2022-02-03 16:34   ` Jakub Kicinski
2022-02-03 16:56     ` Eric Dumazet
2022-02-03 18:58       ` Jakub Kicinski
2022-02-03 19:12         ` Eric Dumazet
2022-02-03  1:51 ` [PATCH net-next 02/15] ipv6: add dev->gso_ipv6_max_size Eric Dumazet
2022-02-03  8:57   ` Paolo Abeni
2022-02-03 15:34     ` Eric Dumazet
2022-02-03  1:51 ` [PATCH net-next 03/15] tcp_cubic: make hystart_ack_delay() aware of BIG TCP Eric Dumazet
2022-02-03  1:51 ` [PATCH net-next 04/15] ipv6: add struct hop_jumbo_hdr definition Eric Dumazet
2022-02-03  1:51 ` [PATCH net-next 05/15] ipv6/gso: remove temporary HBH/jumbo header Eric Dumazet
2022-02-03 18:53   ` Alexander H Duyck
2022-02-03 19:17     ` Eric Dumazet
2022-02-03 19:45       ` Alexander Duyck
2022-02-03 19:59         ` Eric Dumazet
2022-02-03 21:08           ` Alexander H Duyck
2022-02-03 21:41             ` Eric Dumazet
2022-02-04  0:05               ` Alexander Duyck
2022-02-04  0:27                 ` Eric Dumazet
2022-02-04  1:14                   ` Eric Dumazet
2022-02-04  1:48                     ` Eric Dumazet
2022-02-04  2:15                       ` Eric Dumazet
2022-02-03  1:51 ` [PATCH net-next 06/15] ipv6/gro: insert " Eric Dumazet
2022-02-03  9:19   ` Paolo Abeni
2022-02-03 15:48     ` Eric Dumazet
2022-02-03  1:51 ` [PATCH net-next 07/15] ipv6: add GRO_IPV6_MAX_SIZE Eric Dumazet
2022-02-03  2:18   ` Eric Dumazet
2022-02-03 10:44   ` Paolo Abeni
2022-02-03  1:51 ` [PATCH net-next 08/15] ipv6: Add hop-by-hop header to jumbograms in ip6_output Eric Dumazet
2022-02-03  9:07   ` Paolo Abeni
2022-02-03 16:31     ` Eric Dumazet
2022-02-03  1:51 ` [PATCH net-next 09/15] net: increase MAX_SKB_FRAGS Eric Dumazet
2022-02-03  5:02   ` kernel test robot
2022-02-03  5:20     ` Eric Dumazet
2022-02-03  5:31       ` Jakub Kicinski
2022-02-03  6:35         ` Eric Dumazet
2022-02-03  5:23   ` kernel test robot
2022-02-03  5:43   ` kernel test robot
2022-02-03 16:01   ` Paolo Abeni
2022-02-03 17:26   ` Alexander H Duyck
2022-02-03 17:34     ` Eric Dumazet
2022-02-03 17:56       ` Alexander Duyck
2022-02-03 19:18         ` Jakub Kicinski
2022-02-03 19:20           ` Eric Dumazet
2022-02-03 19:54             ` Eric Dumazet
2022-02-04 10:18         ` David Laight
2022-02-04 15:46           ` Alexander Duyck
2022-02-03  1:51 ` Eric Dumazet [this message]
2022-02-03  1:51 ` [PATCH net-next 11/15] bonding: update dev->tso_ipv6_max_size Eric Dumazet
2022-02-03  1:51 ` [PATCH net-next 12/15] macvlan: enable BIG TCP Packets Eric Dumazet
2022-02-03  1:51 ` [PATCH net-next 13/15] ipvlan: " Eric Dumazet
2022-02-03  1:51 ` [PATCH net-next 14/15] mlx4: support BIG TCP packets Eric Dumazet
2022-02-03 13:04   ` Tariq Toukan
2022-02-03 15:54     ` Eric Dumazet
2022-02-03  1:51 ` [PATCH net-next 15/15] mlx5: " Eric Dumazet
2022-02-03  7:27   ` Tariq Toukan
2022-02-04  4:03   ` kernel test robot

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