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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: NetworkManagerAssignee: Lubomir Rintel <lrintel>
Status: CLOSED ERRATA QA Contact: Matej Berezny <mberezny>
Severity: medium Docs Contact:
Priority: medium    
Version: 8.7CC: arawal, bgalvani, ferferna, fpokryvk, lrintel, mberezny, rkhan, sfaye, sukulkar, surkumar, thaller, till
Target Milestone: rcKeywords: Triaged
Target Release: ---Flags: pm-rhel: mirror+
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:
: 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