Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Bug 844376

Summary: kvm guest of windows2008 using 48vcpu cause the host system hang.
Product: Red Hat Enterprise Linux 6 Reporter: davidyangyi <davidyangyi>
Component: qemu-kvmAssignee: Gleb Natapov <gleb>
Status: CLOSED DUPLICATE QA Contact: Virtualization Bugs <virt-bugs>
Severity: high Docs Contact:
Priority: unspecified    
Version: 6.2CC: acathrow, areis, bcao, bsarathy, dyasny, juzhang, knoel, michen, mkenneth, shuang, virt-maint, xfu
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-10-03 11:49:00 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
template file none

Description davidyangyi 2012-07-30 12:51:10 UTC 
Description of problem:
the host has 48core cpu, and I create just one kvm guest of win2008 of 48vcpu.
when vm start, the host cpu idle is 0%, qemu-kvm takes 4800 %CPU and later the host system hang.
and there is nothing in the /var/log/messages

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


How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:
Comment 2 Miya Chen 2012-07-30 14:30:09 UTC 
Should be duplicate to:
https://bugzilla.redhat.com/show_bug.cgi?id=820112
Comment 3 davidyangyi 2012-07-30 23:55:06 UTC 
thanks, but I cannot access the url, why ?

"You are not authorized to access bug #820112"

If I don't have the permission, would you please paste the important part of the tips here? thank you very much.
Comment 4 Mike Cao 2012-07-31 02:37:43 UTC 
(In reply to comment #3)
> thanks, but I cannot access the url, why ?
> 
> "You are not authorized to access bug #820112"
> 
> If I don't have the permission, would you please paste the important part of
> the tips here? thank you very much.

Is it a AMD host ? If it is ,pls try to append -numa options in qemu-kvm commandline 
eg: <commandline> -numa node,mem=32G,cpus=0,4,8,12,16,20,nodeid=0  -numa node,mem=32G,cpus=24,28,32,36,40,44,nodeid=1 -numa node,mem=32G,cpus=3,7,11,15,19,23,nodeid=2 -numa node,mem=32G,cpus=27,31,35,39,43,47,nodeid=3 -numa node,mem=32G,cpus=2,6,10,14,18,22,nodeid=4 -numa node,mem=32G,cpus=26,30,34,38,42,46,nodeid=5 -numa node,mem=32G,cpus=1,5,9,13,17,21,nod eid=6 -numa node,mem=32G,cpus=25,29,33,37,41,45,nodeid=7
Comment 5 Mike Cao 2012-07-31 03:01:44 UTC 
(In reply to comment #3)
> thanks, but I cannot access the url, why ?
> 
> "You are not authorized to access bug #820112"
> 
> If I don't have the permission, would you please paste the important part of
> the tips here? thank you very much.

It is a public bug now ,you can try to visit it again.
Comment 6 davidyangyi 2012-07-31 06:42:44 UTC 
Created attachment 601433 [details]
template file
Comment 7 davidyangyi 2012-07-31 06:43:54 UTC 
Comment on attachment 601433 [details]
template file

I add numa into my template file, but it's still the same.

top - 14:44:23 up 3 days, 21:20,  2 users,  load average: 28.16, 7.86, 2.74
Tasks: 960 total,   1 running, 959 sleeping,   0 stopped,   0 zombie
Cpu(s):  3.8%us, 96.2%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:  132141572k total, 12608292k used, 119533280k free,   153568k buffers
Swap: 134217720k total,        0k used, 134217720k free,  2769336k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                         
60177 qemu      20   0  104g 6.8g 3544 S 4814.3  5.4  43:37.13 qemu-kvm                                                                                      
60347 oneadmin  20   0 23728 2296 1224 S  4.9  0.0   0:00.23 ruby                                                                                            
60349 oneadmin  20   0 13872 1796  836 S  2.0  0.0   0:00.06 top                                                                                             
60247 root      20   0 13860 1836  844 R  1.3  0.0   0:01.11 top                                                                                             
  195 root      20   0     0    0    0 S  1.0  0.0   0:04.42 events/0                                                                                        
 3253 root      20   0  991m  12m 4336 S  0.7  0.0   1:10.23 libvirtd                                                                                        
    1 root      20   0 19404 1500 1192 S  0.0  0.0   0:04.36 init                                                                                            
    2 root      20   0     0    0    0 S  0.0  0.0   0:00.01 kthreadd
Comment 8 Mike Cao 2012-07-31 06:50:26 UTC 
(In reply to comment #7)
> Comment on attachment 601433 [details]
> template file
> 
> I add numa into my template file, but it's still the same.
> 
Does it happen during guest boot or after guest login or both ?

Thanks,
Mike
Comment 9 davidyangyi 2012-07-31 06:54:24 UTC 
Comment on attachment 601433 [details]
template file

I add numa into my template file, but it's still the same.

top - 14:44:23 up 3 days, 21:20,  2 users,  load average: 28.16, 7.86, 2.74
Tasks: 960 total,   1 running, 959 sleeping,   0 stopped,   0 zombie
Cpu(s):  3.8%us, 96.2%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:  132141572k total, 12608292k used, 119533280k free,   153568k buffers
Swap: 134217720k total,        0k used, 134217720k free,  2769336k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                         
60177 qemu      20   0  104g 6.8g 3544 S 4814.3  5.4  43:37.13 qemu-kvm                                                                                      
60347 oneadmin  20   0 23728 2296 1224 S  4.9  0.0   0:00.23 ruby                                                                                            
60349 oneadmin  20   0 13872 1796  836 S  2.0  0.0   0:00.06 top                                                                                             
60247 root      20   0 13860 1836  844 R  1.3  0.0   0:01.11 top                                                                                             
  195 root      20   0     0    0    0 S  1.0  0.0   0:04.42 events/0                                                                                        
 3253 root      20   0  991m  12m 4336 S  0.7  0.0   1:10.23 libvirtd                                                                                        
    1 root      20   0 19404 1500 1192 S  0.0  0.0   0:04.36 init                                                                                            
    2 root      20   0     0    0    0 S  0.0  0.0   0:00.01 kthreadd
Comment 10 davidyangyi 2012-07-31 06:59:06 UTC 
Comment on attachment 601433 [details]
template file

I add numa into my template file, but it's still the same.

top - 14:44:23 up 3 days, 21:20,  2 users,  load average: 28.16, 7.86, 2.74
Tasks: 960 total,   1 running, 959 sleeping,   0 stopped,   0 zombie
Cpu(s):  3.8%us, 96.2%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:  132141572k total, 12608292k used, 119533280k free,   153568k buffers
Swap: 134217720k total,        0k used, 134217720k free,  2769336k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                         
60177 qemu      20   0  104g 6.8g 3544 S 4814.3  5.4  43:37.13 qemu-kvm                                                                                      
60347 oneadmin  20   0 23728 2296 1224 S  4.9  0.0   0:00.23 ruby                                                                                            
60349 oneadmin  20   0 13872 1796  836 S  2.0  0.0   0:00.06 top                                                                                             
60247 root      20   0 13860 1836  844 R  1.3  0.0   0:01.11 top                                                                                             
  195 root      20   0     0    0    0 S  1.0  0.0   0:04.42 events/0                                                                                        
 3253 root      20   0  991m  12m 4336 S  0.7  0.0   1:10.23 libvirtd                                                                                        
    1 root      20   0 19404 1500 1192 S  0.0  0.0   0:04.36 init                                                                                            
    2 root      20   0     0    0    0 S  0.0  0.0   0:00.01 kthreadd
Comment 11 davidyangyi 2012-07-31 07:22:12 UTC 
Comment on attachment 601433 [details]
template file

I add numa into my template file, but it's still the same.

top - 14:44:23 up 3 days, 21:20,  2 users,  load average: 28.16, 7.86, 2.74
Tasks: 960 total,   1 running, 959 sleeping,   0 stopped,   0 zombie
Cpu(s):  3.8%us, 96.2%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:  132141572k total, 12608292k used, 119533280k free,   153568k buffers
Swap: 134217720k total,        0k used, 134217720k free,  2769336k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                         
60177 qemu      20   0  104g 6.8g 3544 S 4814.3  5.4  43:37.13 qemu-kvm                                                                                      
60347 oneadmin  20   0 23728 2296 1224 S  4.9  0.0   0:00.23 ruby                                                                                            
60349 oneadmin  20   0 13872 1796  836 S  2.0  0.0   0:00.06 top                                                                                             
60247 root      20   0 13860 1836  844 R  1.3  0.0   0:01.11 top                                                                                             
  195 root      20   0     0    0    0 S  1.0  0.0   0:04.42 events/0                                                                                        
 3253 root      20   0  991m  12m 4336 S  0.7  0.0   1:10.23 libvirtd                                                                                        
    1 root      20   0 19404 1500 1192 S  0.0  0.0   0:04.36 init                                                                                            
    2 root      20   0     0    0    0 S  0.0  0.0   0:00.01 kthreadd
Comment 12 Ademar Reis 2012-08-16 22:29:16 UTC 
(In reply to comment #8)
> 
> Does it happen during guest boot or after guest login or both?

Can you also tell us the CPU model? (cat /proc/cpuinfo)

Looks like a duplicate of either bug 844862 or bug 820112.
Comment 13 Gleb Natapov 2012-08-27 13:11:46 UTC 
Probably DUP of bug 827031 (host kernel hang part). Retset with the fix (kernel-2.6.32-288.el6 or later)
Comment 14 Karen Noel 2012-10-03 11:49:00 UTC 

*** This bug has been marked as a duplicate of bug 827031 ***