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Bug 233971 - HVM guest hangs on vcpu migration ( emulation bug)
Summary: HVM guest hangs on vcpu migration ( emulation bug)
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel-xen
Version: 5.0
Hardware: All
OS: Linux
Target Milestone: ---
: ---
Assignee: Keiichiro Tokunaga
QA Contact: Martin Jenner
Depends On:
TreeView+ depends on / blocked
Reported: 2007-03-26 13:02 UTC by Bryn M. Reeves
Modified: 2018-10-19 22:45 UTC (History)
5 users (show)

Fixed In Version: RHBA-2007-0959
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2007-11-07 19:45:14 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2007:0959 normal SHIPPED_LIVE Updated kernel packages for Red Hat Enterprise Linux 5 Update 1 2007-11-08 00:47:37 UTC

Description Bryn M. Reeves 2007-03-26 13:02:01 UTC
Description of problem:
When a HVM guest migrates to the local CPU on ia64, smp_call_function_single()
doesn't work. Upstream has moved to using ptc_ga_remote_func() directly instead
in the xen-ia64-unstable tree.

Version-Release number of selected component (if applicable):

How reproducible:
Variable. This is reportedly easily reproduced with a Windows guest by
repeatedly connecting/disconnecting RDP (remote desktop) sessions. Will update
this BZ if/when we have better steps to reproduce.

Steps to Reproduce:
1. Start a HVM guest
2. In the guest, cause frequent vcpu migration

Actual results:
Eventually HVM guest will hang

Expected results:
HVM guest does not hang

Additional info:

Comment 1 Bryn M. Reeves 2007-03-26 13:04:28 UTC
xen-ia64-unstable changeset with smp_call_function_single() ->
ptc_ga_remote_func() change:

Comment 3 RHEL Product and Program Management 2007-04-25 20:35:02 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update

Comment 4 Larry Troan 2007-06-27 00:00:10 UTC
Need devel and QA ACKs before we can request an exception.

Comment 6 Martin Jenner 2007-07-09 15:41:30 UTC
QE ack for RHEL 5.1

Comment 7 Don Zickus 2007-07-10 16:21:19 UTC
in 2.6.18-33.el5
You can download this test kernel from

Comment 8 Larry Troan 2007-07-11 13:52:00 UTC
QE ACK per comment #6 assumes Fujitsu will test.

Comment 10 Red Hat Bugzilla 2007-07-25 00:44:23 UTC
change QA contact

Comment 11 Issue Tracker 2007-08-10 06:30:49 UTC
Fujitsu's feedback of testing on EL5.1 beta is good.

5.1 beta is OK. The test passed.


Status set to: Next Update

This event sent from IssueTracker by mmatsuya 
 issue 116351

Comment 13 errata-xmlrpc 2007-11-07 19:45:14 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

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