Bug 624365

Summary: cpu flags missing from /proc/cpuinfo [rhel-5.5.z]
Product: Red Hat Enterprise Linux 5 Reporter: RHEL Product and Program Management <pm-rhel>
Component: kernel-xenAssignee: Jiri Pirko <jpirko>
Status: CLOSED ERRATA QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: medium Docs Contact:
Priority: low    
Version: 5.5CC: caiqian, dhoward, drjones, gao, gcase, jpirko, jvillalo, jwest, jzheng, pbonzini, pm-eus, prarit, rkhan, sputhenp, xen-maint
Target Milestone: rcKeywords: Reopened, ZStream
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2010-09-29 10:54:45 EDT Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Bug Depends On: 570091    
Bug Blocks:    

Description RHEL Product and Program Management 2010-08-16 03:41:29 EDT
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 05:22:28 EDT
in 2.6.18-194.13.1.el5
Comment 5 Jinxin Zheng 2010-09-14 08:11:59 EDT
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 02:26:26 EDT
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 10:54:45 EDT
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