This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1987618
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1987618
Title:
[jammy mlx5] Slow outbound N/S TCP connections for instances on
gateways
Status in linux package in Ubuntu:
Incomplete
Bug description:
Charmed OpenStack on Jammy.
Hardware offloaded instances that reside on the hypervisor which is
also the active OVN gateway for their network have degraded
connectivity.
$ time wget --debug -O /dev/null http://nova.clouds.archive.ubuntu.com/ubuntu/
Setting --output-document (outputdocument) to /dev/null
DEBUG output created by Wget 1.21.2 on linux-gnu.
Reading HSTS entries from /home/ubuntu/.wget-hsts
URI encoding = ‘UTF-8’
--2022-08-25 07:16:54-- http://nova.clouds.archive.ubuntu.com/ubuntu/
Resolving nova.clouds.archive.ubuntu.com (nova.clouds.archive.ubuntu.com)...
91.189.91.121, 185.125.190.38, 185.125.190.41, ...
Caching nova.clouds.archive.ubuntu.com => 91.189.91.121 185.125.190.38
185.125.190.41 91.189.91.122 2001:67c:1562::29 2620:2d:4000:1::1b
2620:2d:4000:1::18 2001:67c:1562::26
Connecting to nova.clouds.archive.ubuntu.com
(nova.clouds.archive.ubuntu.com)|91.189.91.121|:80... connected.
Created socket 4.
Releasing 0x000055ef05654490 (new refcount 1).
---request begin---
GET /ubuntu/ HTTP/1.1
Host: nova.clouds.archive.ubuntu.com
User-Agent: Wget/1.21.2
Accept: */*
Accept-Encoding: identity
Connection: Keep-Alive
---request end---
HTTP request sent, awaiting response...
---response begin---
HTTP/1.1 200 OK
Date: Thu, 25 Aug 2022 07:16:54 GMT
Server: Apache/2.4.29 (Ubuntu)
Vary: Accept-Encoding
Content-Length: 1779
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html;charset=UTF-8
---response end---
200 OK
Registered socket 4 for persistent reuse.
URI content encoding = ‘UTF-8’
Length: 1779 (1.7K) [text/html]
Saving to: ‘/dev/null’
/dev/null
100%[====================================================================================================================================>]
1.74K --.-KB/s in 0.07s
2022-08-25 07:16:59 (24.3 KB/s) - ‘/dev/null’ saved [1779/1779]
real 0m5.591s
user 0m0.000s
sys 0m0.005s
$ sudo tcpdump -nevi ens3 not port 22
07:16:54.017265 fa:16:3e:6d:94:75 > fa:16:3e:47:3a:ad, ethertype IPv4
(0x0800), length 74: (tos 0x0, ttl 64, id 50207, offset 0, flags [DF], proto
TCP (6), length 60)
10.42.1.8.43060 > 91.189.91.121.80: Flags [S], cksum 0xc296 (incorrect ->
0x4190), seq 2905559525, win 62314, options [mss 8902,sackOK,TS val 4081686695
ecr 0,nop,wscale 7], length 0
07:16:54.091378 fa:16:3e:47:3a:ad > fa:16:3e:6d:94:75, ethertype IPv4
(0x0800), length 74: (tos 0x0, ttl 58, id 0, offset 0, flags [DF], proto TCP
(6), length 60)
91.189.91.121.80 > 10.42.1.8.43060: Flags [S.], cksum 0x809d (correct),
seq 3404088064, ack 2905559526, win 65160, options [mss 1460,sackOK,TS val
932285789 ecr 4081686695,nop,wscale 7], length 0
07:16:54.091402 fa:16:3e:6d:94:75 > fa:16:3e:47:3a:ad, ethertype IPv4
(0x0800), length 66: (tos 0x0, ttl 64, id 50208, offset 0, flags [DF], proto
TCP (6), length 52)
10.42.1.8.43060 > 91.189.91.121.80: Flags [.], cksum 0xc28e (incorrect ->
0xabc0), ack 1, win 487, options [nop,nop,TS val 4081686770 ecr 932285789],
length 0
07:16:54.091512 fa:16:3e:6d:94:75 > fa:16:3e:47:3a:ad, ethertype IPv4
(0x0800), length 218: (tos 0x0, ttl 64, id 50209, offset 0, flags [DF], proto
TCP (6), length 204)
10.42.1.8.43060 > 91.189.91.121.80: Flags [P.], cksum 0xc326 (incorrect
-> 0x7d0c), seq 1:153, ack 1, win 487, options [nop,nop,TS val 4081686770 ecr
932285789], length 152: HTTP, length: 152
GET /ubuntu/ HTTP/1.1
Host: nova.clouds.archive.ubuntu.com
User-Agent: Wget/1.21.2
Accept: */*
Accept-Encoding: identity
Connection: Keep-Alive
07:16:54.166170 fa:16:3e:47:3a:ad > fa:16:3e:6d:94:75, ethertype IPv4
(0x0800), length 66: (tos 0x0, ttl 58, id 15660, offset 0, flags [DF], proto
TCP (6), length 52)
91.189.91.121.80 > 10.42.1.8.43060: Flags [.], cksum 0xaac7 (correct),
ack 153, win 508, options [nop,nop,TS val 932285865 ecr 4081686770], length 0
07:16:59.171924 fa:16:3e:47:3a:ad > fa:16:3e:6d:94:75, ethertype IPv4
(0x0800), length 66: (tos 0x0, ttl 58, id 15669, offset 0, flags [DF], proto
TCP (6), length 52)
91.189.91.121.80 > 10.42.1.8.43060: Flags [F.], cksum 0x8f61 (correct),
seq 2008, ack 153, win 508, options [nop,nop,TS val 932290871 ecr 4081686770],
length 0
07:16:59.171956 fa:16:3e:6d:94:75 > fa:16:3e:47:3a:ad, ethertype IPv4
(0x0800), length 78: (tos 0x0, ttl 64, id 50210, offset 0, flags [DF], proto
TCP (6), length 64)
10.42.1.8.43060 > 91.189.91.121.80: Flags [.], cksum 0xc29a (incorrect ->
0x356e), ack 1, win 487, options [nop,nop,TS val 4081691850 ecr
932285865,nop,nop,sack 1 {2008:2009}], length 0
07:16:59.531552 fa:16:3e:47:3a:ad > fa:16:3e:6d:94:75, ethertype IPv4
(0x0800), length 1440: (tos 0x0, ttl 58, id 15671, offset 0, flags [DF], proto
TCP (6), length 1426)
91.189.91.121.80 > 10.42.1.8.43060: Flags [.], cksum 0x0d7c (correct),
seq 1:1375, ack 153, win 508, options [nop,nop,TS val 932291230 ecr
4081691850], length 1374: HTTP, length: 1374
HTTP/1.1 200 OK
Date: Thu, 25 Aug 2022 07:16:54 GMT
Server: Apache/2.4.29 (Ubuntu)
Vary: Accept-Encoding
Content-Length: 1779
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html;charset=UTF-8
...
The issue appears to be present in mainline kernels up to v5.17, and appears
to be fixed in kernel v5.18.
We have yet to identify exactly what in the diff from v5.17 to v5.18
fixes the issue.
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