Bug 473408 – Prolonged network blackout during migration of RHEL 4.7

Bug 473408 - Prolonged network blackout during migration of RHEL 4.7

Summary:	Prolonged network blackout during migration of RHEL 4.7

Status:	CLOSED DUPLICATE of bug 460874

Aliases:	None

Product:	Red Hat Enterprise Linux 4
Classification:	Red Hat
Component:	kernel-xen (Show other bugs)
Sub Component:
Version:	4.7
Hardware:	All Linux

Priority	medium Severity high
Target Milestone:	rc
Target Release:	---
Assigned To:	Xen Maintainance List
QA Contact:	Martin Jenner
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2008-11-28 06:22 EST by Ian Campbell
Modified:	2008-12-01 12:08 EST (History)
CC List:	2 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2008-12-01 12:08:54 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Use register_netdevice_notifier not register_inetaddr_notifier (1.21 KB, patch) 2008-11-28 06:22 EST, Ian Campbell	no flags	Details \| Diff
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Ian Campbell 2008-11-28 06:22:12 EST

After a live migration of a 2.6.9-78.EL kernel we are seeing network blackouts on the order of several minutes. It appears that the gratuituous ARP is not being sent at all.

In 2.6.9-72.EL RHEL 4 bug #444473 was closed after applying the patch from #441716 comment #5 however #441716 comment #6 points out that this doesn't work due to "silly cut and paste errors" and proposes an updated patch instead, this is the one which is in RHEL 5 currently. I've patched in the difference between the two (basically turning register_inetaddr_notifier into  register_netdevice_notifier) onto 2.6.9-78.0.5.EL and it seems to repair things.

Comment 1 Ian Campbell 2008-11-28 06:22:56 EST

Created attachment 324981 [details]
Use register_netdevice_notifier not register_inetaddr_notifier

Comment 3 Herbert Xu 2008-11-28 07:35:10 EST

Already fixed in 78-15.  As to whether the fix will make it to RHEL4.7 I'm afraid I'm qualified to answer.

Comment 4 Ian Campbell 2008-11-28 08:40:40 EST

Thanks. Is there a bugzilla entry already? I searched before I filed this but didn't find it.

Comment 5 Don Dutile 2008-12-01 12:08:54 EST

the bz that fixed this problem is 460874.

It is being backported to the 4.7-z stream release under bz 469891.

Closing this bz as a dupe of 460874 & 469891.

- Don

*** This bug has been marked as a duplicate of bug 460874 ***

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