Bug 624365 - cpu flags missing from /proc/cpuinfo [rhel-5.5.z]
Summary: cpu flags missing from /proc/cpuinfo [rhel-5.5.z]
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel-xen
Version: 5.5
Hardware: All
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Jiri Pirko
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On: 570091
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-08-16 07:41 UTC by RHEL Program Management
Modified: 2015-05-05 01:20 UTC (History)
15 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-09-29 14:54:45 UTC
Target Upstream Version:
Embargoed:


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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2010:0723 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2010-09-29 14:53:22 UTC

Description RHEL Program Management 2010-08-16 07:41:29 UTC
This bug has been copied from bug #570091 and has been proposed
to be backported to 5.5 z-stream (EUS).

Comment 3 Jiri Pirko 2010-08-28 09:22:28 UTC
in 2.6.18-194.13.1.el5

Comment 5 Jinxin Zheng 2010-09-14 12:11:59 UTC
I tested this on AMD and Intel separately.

For AMD:

with kernel-xen-2.6.18-194.11.3.el5, I see no svm flag on cpuinfo (from dom0):

# cat /proc/cpuinfo | grep svm

with kernel-xen-2.6.18-194.13.1.el5, the svm flag is back:

# cat /proc/cpuinfo | grep svm
flags		: fpu tsc msr pae cx8 apic mtrr cmov pat clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow constant_tsc pni cx16 popcnt lahf_lm cmp_legacy svm cr8_legacy abm sse4a misalignsse

For Intel, the situation is similar:

kernel-xen-2.6.18-194.11.3.el5:
# cat /proc/cpuinfo | grep vmx

kernel-xen-2.6.18-194.13.1.el5:
# cat /proc/cpuinfo | grep vmx
flags		: fpu tsc msr pae cx8 apic mtrr cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc pni vmx est ssse3 cx16 sse4_1 lahf_lm

As a result, I'm putting this bug in VERIFIED.

Comment 6 Jinxin Zheng 2010-09-15 06:26:26 UTC
Tested again with kernel-xen-2.6.18-194.15.1.el5. Results are the same as in comment 5.

Comment 7 errata-xmlrpc 2010-09-29 14:54:45 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-2010-0723.html


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