Bug 2154350

Summary:	NetworkManager intermittently fails to configure MTU with netlink error 'too many netlink events'
Product:	Red Hat Enterprise Linux 8	Reporter:	Sara Ferguson <sferguso>
Component:	NetworkManager	Assignee:	Lubomir Rintel <lrintel>
Status:	CLOSED ERRATA	QA Contact:	Matej Berezny <mberezny>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	8.7	CC:	arawal, bgalvani, ferferna, fpokryvk, lrintel, mberezny, rkhan, sfaye, sukulkar, surkumar, thaller, till
Target Milestone:	rc	Keywords:	Triaged
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	NetworkManager-1.40.12-1.el8	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:
Clones:	2169512 (view as bug list)		Environment:
Last Closed:	2023-05-16 09:05:00 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2169512

Comment 4 Lubomir Rintel 2023-01-17 18:34:24 UTC

This should fix the issue:
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/commit/38d3834e2c464bd4820392800a3a1fe3f286fc62

I got to say -- thanks for the great job at investigating the causes while reporting it.
You were spot on about what's going on and the remark about net.core.rmem_max was particularly helpful.

Comment 5 Thomas Haller 2023-01-17 19:44:55 UTC

(In reply to Lubomir Rintel from comment #4)
> This should fix the issue:
> https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/commit/
> 38d3834e2c464bd4820392800a3a1fe3f286fc62

I think this also needs a similar fix for when we configure IP addresses, routes, etc. Doesn't it?

Comment 6 Lubomir Rintel 2023-01-23 07:47:10 UTC

(In reply to Thomas Haller from comment #5)
> (In reply to Lubomir Rintel from comment #4)
> > This should fix the issue:
> > https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/commit/
> > 38d3834e2c464bd4820392800a3a1fe3f286fc62
> 
> I think this also needs a similar fix for when we configure IP addresses,
> routes, etc. Doesn't it?

Good point. I think so.

Comment 7 Fernando F. Mancera 2023-01-25 13:34:47 UTC

This requires backport to nm-1-40 branch

Comment 9 Thomas Haller 2023-02-13 20:03:23 UTC

(In reply to Thomas Haller from comment #5)
> (In reply to Lubomir Rintel from comment #4)
> > This should fix the issue:
> > https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/commit/
> > 38d3834e2c464bd4820392800a3a1fe3f286fc62
> 
> I think this also needs a similar fix for when we configure IP addresses,
> routes, etc. Doesn't it?

But was cloned to https://bugzilla.redhat.com/show_bug.cgi?id=2169512 for that...

Comment 13 errata-xmlrpc 2023-05-16 09:05:00 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (NetworkManager bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:2968