Bug 807354 - xenpv guests fail to find root device
Summary: xenpv guests fail to find root device
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.2
Hardware: Unspecified
OS: Unspecified
unspecified
urgent
Target Milestone: rc
: ---
Assignee: Andrew Jones
QA Contact: Virtualization Bugs
URL:
Whiteboard: xen
: 807454 808637 (view as bug list)
Depends On:
Blocks: 653816
TreeView+ depends on / blocked
 
Reported: 2012-03-27 15:12 UTC by Andrew Jones
Modified: 2012-06-20 08:44 UTC (History)
11 users (show)

Fixed In Version: kernel-2.6.32-259.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2012-06-20 08:44:16 UTC
Target Upstream Version:

Attachments (Terms of Use)
patch modifying the conditions (1.23 KB, patch)
2012-03-27 15:54 UTC, Andrew Jones 		no flags Details | Diff
View All Add an attachment (proposed patch, testcase, etc.)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2012:0862 0 normal SHIPPED_LIVE Moderate: Red Hat Enterprise Linux 6 kernel security, bug fix and enhancement update 2012-06-20 12:55:00 UTC

Description Andrew Jones 2012-03-27 15:12:58 UTC 
With kernel -256 and later builds xenpv guests will fail to boot due to not finding their root device. From a quick check of the git history, the mostly likely cause is commit 7b34e5d

7b34e5d [virt] xen: initialize platform_pci even if xen_emul_unplug=never

It looks like the problem is that we moved a condition that used to be in an HVM only path into a PV _and_ HVM path. Thus the condition needs to be if (HVM && <condition>).
Comment 1 RHEL Program Management 2012-03-27 15:19:53 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 2 Andrew Jones 2012-03-27 15:54:06 UTC 
Created attachment 573110 [details]
patch modifying the conditions
Comment 3 Andrew Jones 2012-03-28 07:45:39 UTC 
*** Bug 807454 has been marked as a duplicate of this bug. ***
Comment 4 Aristeu Rozanski 2012-03-30 14:26:10 UTC 
Patch(es) available on kernel-2.6.32-259.el6
Comment 6 Andrew Jones 2012-04-02 09:04:32 UTC 
*** Bug 808637 has been marked as a duplicate of this bug. ***
Comment 8 Qixiang Wan 2012-04-18 01:29:47 UTC 
Verified with kernel-2.6.32-259.el6 and kernel-2.6.32-265.el6. Tested both i386 and x86_64 Xen PV guests, can boot up successfully after the fix. So change this bug to VERIFIED.
Comment 10 errata-xmlrpc 2012-06-20 08:44:16 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, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2012-0862.html
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