Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.
For bugs related to Red Hat Enterprise Linux 5 product line. The current stable release is 5.10. For Red Hat Enterprise Linux 6 and above, please visit Red Hat JIRA https://issues.redhat.com/secure/CreateIssue!default.jspa?pid=12332745 to report new issues.

Bug 664357

Summary: guest kernel panic when boot with sse4.2 on host not support sse4.2
Product: Red Hat Enterprise Linux 5 Reporter: Suqin Huang <shuang>
Component: kvmAssignee: john cooper <john.cooper>
Status: CLOSED DUPLICATE QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 5.6CC: mkenneth, nobody, virt-maint
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-01-13 20:20:12 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 580948    
Attachments:
Description Flags
kernel panic none

Description Suqin Huang 2010-12-20 04:46:04 UTC 
Description of problem:
"kernel panic - not syncing: Attempted to kill init!" when boot rhel6-i386 with sse4.2 on host not support sse4.2

Version-Release number of selected component (if applicable):
kvm-83-223.el5

How reproducible:
100% 

Steps to Reproduce:
1. cmd
/usr/libexec/qemu-kvm -drive file=/images/RHEL-Server-6.0-32.qcow2,index=0,if=ide,media=disk,cache=none,format=qcow2 -net nic,vlan=0,model=rtl8139,macaddr=00:1a:20:68:80:e6 -net tap,vlan=0,script=/kvm/scripts/qemu-ifup-switch,downscript=no -m 2048 -smp 2,cores=1,threads=1,sockets=2 -cpu qemu64,+sse2,+sse4.2 -vnc :1 -rtc-td-hack -M rhel5.6.0 -usbdevice tablet -no-kvm-pit-reinjection -boot c -monitor stdio
2.
3.
  
Actual results:
"kernel panic - not syncing: Attempted to kill init!"

Expected results:


Additional info:
1. host
kernel: 2.6.18-237.el5

cpu:
processor	: 3
vendor_id	: GenuineIntel
cpu family	: 6
model		: 23
model name	: Intel(R) Core(TM)2 Quad CPU    Q9400  @ 2.66GHz
stepping	: 10
cpu MHz		: 2000.000
cache size	: 3072 KB

flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr sse4_1 lahf_lm

[root@intel-q9400-4-2 kvm]# cat /proc/cmdline 
ro root=/dev/VolGroup00/LogVol00 console=ttyS0,115200 console=tty0

2. can not reproduce when boot without sse4.2
3. can not reproduce on i7 host (support sse4.2)

processor	: 7
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Core(TM) i7 CPU         920  @ 2.67GHz

flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr sse4_1 sse4_2 popcnt lahf_lm

3. guest
2.6.32-71.el6.i686
Comment 1 Suqin Huang 2010-12-20 04:58:07 UTC 
Created attachment 469674 [details]
kernel panic

reproduce when install guest with sse4.2
Comment 2 john cooper 2011-01-13 20:20:12 UTC 
Looks like we have a cpu flag verification problem relative to host
flags.  Appears to be a dup of 664363, moving to that case.

*** This bug has been marked as a duplicate of bug 664363 ***