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Bug 230634 - PVFB backend fails to terminate when frontend vanishes early
Summary: PVFB backend fails to terminate when frontend vanishes early
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: xen
Version: 5.0
Hardware: All
OS: Linux
Target Milestone: ---
: ---
Assignee: Markus Armbruster
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2007-03-01 21:39 UTC by Markus Armbruster
Modified: 2007-11-30 22:07 UTC (History)
1 user (show)

Fixed In Version: RHEA-2007-0635
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2007-11-07 17:09:59 UTC
Target Upstream Version:

Attachments (Terms of Use)
Proposed fix (deleted)
2007-03-02 14:09 UTC, Markus Armbruster
no flags Details | Diff

System ID Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2007:0635 normal SHIPPED_LIVE xen enhancement update 2007-10-30 15:49:02 UTC

Description Markus Armbruster 2007-03-01 21:39:23 UTC
Description of problem:
When the frontend vanishes from xenstore before the connection is established,
the backend fails to terminate.

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

How reproducible:

Steps to Reproduce:
1. Make sure the guest has a VNC PVFB configured.
2. Start the guest (e.g. with xm create) with a kernel that lacks PVFB.
3. Shut down the guest, e.g. with xm shutdown.
Actual results:
Process xen-vncfb is still running for the guest.

Expected results:
Process xen-vncfb terminates when guest shuts down.

Additional info:
The steps to reproduce use a kernel without PVFB just to make them independent
of timing.  The bug should also bite with a stock kernel (which has PVFB), when
the guest is shut down or destroyed quickly enough.

Comment 1 Markus Armbruster 2007-03-02 14:09:21 UTC
Created attachment 149113 [details]
Proposed fix

The fix submitted upstream is not sufficient with our backwards compatibility

Comment 2 RHEL Product and Program Management 2007-03-29 18:44:35 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 Markus Armbruster 2007-06-14 14:19:31 UTC
Patch has been reviewed and committed to the rhel-5-1-hybrid-merge branch, where
it is now awaiting to be merged into the trunk.

Comment 5 Daniel Berrange 2007-06-14 14:58:15 UTC
Built into dist-5E-qu-candidate as xen-3.0.3-27.el5

* Thu Jun 14 2007 Daniel P. Berrange <> - 3.0.3-27.el5
- Ensure pvfb terminates when frontend vanishes early (rhbz#230634)

Comment 8 errata-xmlrpc 2007-11-07 17:09:59 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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