Bug 245585 - kexec/xen machines may oops in case highmem is present
kexec/xen machines may oops in case highmem is present
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
low Severity low
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Assigned To: Gerd Hoffmann
Martin Jenner
Depends On:
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Reported: 2007-06-25 11:37 EDT by Linda Wang
Modified: 2007-11-30 17:07 EST (History)
1 user (show)

See Also:
Fixed In Version: RHBA-2007-0959
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2007-11-07 14:54:18 EST
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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Description Linda Wang 2007-06-25 11:37:07 EDT
Description of problem:
As reported by Stephen kexec/xen machines may oops in case highmem is present,
i.e. on 32bit machines with more than of 1GB memory

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

How reproducible:

Steps to Reproduce:
Actual results:

Expected results:

Additional info:

This patch fixes it by disabling highmem allocations in the xen case. It is one
of multiple possible ways to fix it.  It's not yet fixed upstream.  The patch
attached has the advantage that it (a) is very simple and (b) has been in the
.kraxel.8 + newer xen test kernels and thus has seen quite some test coverage.
Comment 2 RHEL Product and Program Management 2007-06-25 11:45:47 EDT
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 Don Zickus 2007-06-27 11:57:32 EDT
in 2.6.18-32.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5
Comment 7 errata-xmlrpc 2007-11-07 14:54:18 EST
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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