Bug 541538 - [RHEL4 Xen]: PV guest crash on poweroff
Summary: [RHEL4 Xen]: PV guest crash on poweroff
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel-xen
Version: 4.9
Hardware: All
OS: Linux
high
high
Target Milestone: rc
: ---
Assignee: Chris Lalancette
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2009-11-26 09:17 UTC by Chris Lalancette
Modified: 2011-02-16 15:49 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of: 540811
Environment:
Last Closed: 2011-02-16 15:49:27 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:0263 0 normal SHIPPED_LIVE Important: Red Hat Enterprise Linux 4.9 kernel security and bug fix update 2011-02-16 15:14:55 UTC

Comment 1 Chris Lalancette 2009-11-26 09:19:00 UTC 
In point of fact, I'm going
Comment 2 Chris Lalancette 2009-11-26 09:20:43 UTC 
Sigh, ignore my last (cut-off) comment.

In point of fact, this bug is really a clone of BZ 428892.  That is, a 32-bit guest shows a bogus value in LowTotal.  However, in the process of fixing that bug, we also need to add the code into blkfront to avoid bounce buffering.

Chris Lalancette
Comment 3 RHEL Program Management 2010-04-16 13:40:42 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
release.
Comment 4 Vivek Goyal 2010-09-13 20:21:42 UTC 
Committed in 89.34.EL . RPMS are available at http://people.redhat.com/vgoyal/rhel4/
Comment 9 Jinxin Zheng 2010-12-16 08:35:02 UTC 
Hi Chris,

Can you tell me on what kernel-xen this would reproduce?

I was unable to reproduce it either with kernel-xenU-2.6.9-89.EL.i686 or -89.33.EL. When poweroff in the guest there is no "BUG".

host: kernel-xen-2.6.18-236.el5.x86_64. Is it 'too' new?
Comment 10 Chris Lalancette 2010-12-16 13:56:30 UTC 
It's been a long time.  I don't remember if I ever reproduced this on RHEL-4 or not.  The version of the host should be mostly irrelevant to the test, since it is a guest-side bug.

There are 2 things you can check here:
1)  Before this patch, a 32-bit RHEL-4 guest should show a bogus value in /proc/meminfo LowTotal.  After this patch, the 32-bit  RHEL-4 guest should show a valid value in LowTotal.
2)  Make sure that the patch listed at the end of the original comment is applied.  This will prevent us from using bounce buffering, which should make sure we never run into the original BUG.  I'm not quite sure how to force the bug otherwise.

Chris Lalancette
Comment 11 Jinxin Zheng 2010-12-17 11:25:06 UTC 
inside guest created with 512M memory,

cat /proc/meminfo | grep LowTotal

2.6.9-89.ELxenU:
LowTotal:     4294692996 kB

2.6.9-93.ELxenU:
LowTotal:       524420 kB

so this is VERIFIED according to comment 10.
Comment 12 errata-xmlrpc 2011-02-16 15:49:27 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 therefore 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.

http://rhn.redhat.com/errata/RHSA-2011-0263.html
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