[libvirt-users] automatically detaching PCI host devices from guest for SRIOV usage.

Rajesh Kumar Mallah mallah at tradeindia.com
Mon Aug 27 11:15:02 UTC 2012 

Dear Alex ,

Thanks for the keen observation.
I noticed that #012 in the logs has replaced the newlines in the 
nic.xml file. below is the nic.xml file:


------------- start of nic.xml ---------------------
<hostdev mode='subsystem' type='pci' managed='yes'>
      <source>
        <address domain='0x0000' bus='0x04' slot='0x10' function='0x0'/>
      </source>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</hostdev>
------------- end of nic.xml ------------------------


I will go through the bug you suggested and also (possibly) try to 
repeat the experiment with recent version of Centos .

Regards,
Rajesh Kumar Mallah
Tel. 91-11-46710500 (Ext:303)
Cell +919811255597
Website: http://www.tradeindia.com/
\|/ \|/ \|/   stop printing   \|/ \|/ \|/
 |   |   |    start planting   |   |   |


----- "Alex Jia" <ajia at redhat.com> wrote:

| From: "Alex Jia" <ajia at redhat.com>
| To: "Rajesh Kumar Mallah" <mallah at tradeindia.com>
| Cc: libvirt-users at redhat.com, "vikas pandey" <vikas_pandey at tradeindia.com>
| Sent: Monday, August 27, 2012 4:23:10 PM
| Subject: Re: [libvirt-users] automatically detaching PCI host devices from guest for SRIOV usage.
|
| Hi Rajesh,
| I saw the following XML configuration in your
| case-1-virsh_attach_device_first.log.txt,
| what's "#012"? it seems you copy-paste it from a web, please remove it
| from XML then
| attach it again.
| 
| virDomainAttachDevice:9235 : dom=0x6b20a0, (VM: name=new-installed,
| uuid=6122cebb-e33c-a66a-9b71-a0047c91d7bb), xml=    <hostdev
| mode='subsystem' type='pci' managed='yes'>#012      <source>#012      
|  <address domain='0x0000' bus='0x04' slot='0x10' function='0x0'/>#012 
|     </source>#012      <address type='pci' domain='0x0000' bus='0x00'
| slot='0x03' function='0x0'/>#012    </hostdev>#012
| 
| In addition, I tried to assign/unassign a normal NICs to/from the
| running guest with managed='yes' again,
| indeed, the NICs hasn't been returned to host with 'managed' mode
| although virsh said "Device detached successfully", 
| I must to stop the guest then manually return the NICs device to host
| via 'virsh nodedev-reattach pci_$domain_$bus_$slot_$function'
| such as virsh nodedev-reattach pci_0000_04_10_0, here is a similar bug
| "https://bugzilla.redhat.com/show_bug.cgi?id=843016".
| 
| BTW, rhel6.2 isn't necessary, it should work for other platform such
| as fedora, centos, etc.
| 
| -- 
| Regards,     
| Alex
| 
| 
| ----- Original Message -----
| From: "Rajesh Kumar Mallah" <mallah at tradeindia.com>
| To: "Alex Jia" <ajia at redhat.com>
| Cc: libvirt-users at redhat.com, "vikas pandey"
| <vikas_pandey at tradeindia.com>
| Sent: Monday, August 27, 2012 4:18:01 PM
| Subject: Re: [libvirt-users] automatically detaching PCI host devices
| from guest for SRIOV usage.
| 
| 
| Dear Alex ,
| 
| What do you have in the Host ? Does the guests behave as we are
| expecting
| them to behave in our setup ?
| 
| <offtopic>
| can i get rhel6.2 for trying?
| </offtopic>
| 
| Also i have attached the files this time.
| 
| Regards,
| Rajesh Kumar Mallah
| Tel. 91-11-46710500 (Ext:303)
| Cell +919811255597
| Website: http://www.tradeindia.com/
| \|/ \|/ \|/   stop printing   \|/ \|/ \|/
|  |   |   |    start planting   |   |   |
| 
| 
| ----- "Alex Jia" <ajia at redhat.com> wrote:
| 
| | From: "Alex Jia" <ajia at redhat.com>
| | To: "Rajesh Kumar Mallah" <mallah at tradeindia.com>
| | Cc: libvirt-users at redhat.com, "vikas pandey"
| <vikas_pandey at tradeindia.com>
| | Sent: Monday, August 27, 2012 12:55:14 PM
| | Subject: Re: [libvirt-users] automatically detaching PCI host
| devices from guest for SRIOV usage.
| |
| | Hi Rajesh,
| | I guess you forgot to attach your attachments in here.
| | As usual, I tried to directly assign a PF or VF of the Intel82576
| | to guest on RHEL6.2, my box is Dell Optiplex 755.
| | 
| | -- 
| | Regards,     
| | Alex
| | 
| | 
| | ----- Original Message -----
| | From: "Rajesh Kumar Mallah" <mallah at tradeindia.com>
| | To: "Alex Jia" <ajia at redhat.com>
| | Cc: libvirt-users at redhat.com, "vikas pandey"
| | <vikas_pandey at tradeindia.com>
| | Sent: Saturday, August 25, 2012 2:31:20 PM
| | Subject: Re: [libvirt-users] automatically detaching PCI host
| devices
| | from guest for SRIOV usage.
| | 
| | Dear Alex/List  ,
| | 
| | I am attaching a zip file that contains a set of files.
| | The files that start with case-1 is the case when the PCI
| | device is detached prior to shutdown. case-2 is otherwise.
| | 
| | Kindly have a look when you have time and see if there
| | is any hints. 
| | 
| | BTW can you suggest in what free platform does SRIOV and direct
| | PCI assignment *really* works so that we could try on that as well.
| | 
| | Regards,
| | Rajesh Kumar Mallah
| | Tel. 91-11-46710500 (Ext:303)
| | Cell +919811255597
| | Website: http://www.tradeindia.com/
| | \|/ \|/ \|/   stop printing   \|/ \|/ \|/
| |  |   |   |    start planting   |   |   |
| | 
| | 
| | ----- "Alex Jia" <ajia at redhat.com> wrote:
| | 
| | | From: "Alex Jia" <ajia at redhat.com>
| | | To: "Rajesh Kumar Mallah" <mallah at tradeindia.com>
| | | Cc: libvirt-users at redhat.com, "vikas pandey"
| | <vikas_pandey at tradeindia.com>
| | | Sent: Thursday, August 23, 2012 8:21:58 AM
| | | Subject: Re: [libvirt-users] automatically detaching PCI host
| | devices from guest for SRIOV usage.
| | |
| | | ----- Original Message -----
| | | From: "Rajesh Kumar Mallah" <mallah at tradeindia.com>
| | | To: "Alex Jia" <ajia at redhat.com>
| | | Cc: libvirt-users at redhat.com, "vikas pandey"
| | | <vikas_pandey at tradeindia.com>
| | | Sent: Wednesday, August 22, 2012 7:37:05 PM
| | | Subject: Re: [libvirt-users] automatically detaching PCI host
| | devices
| | | from guest for SRIOV usage.
| | | 
| | | | 
| | | | 
| | | |   Could you attach your libvirtd.log? which's version your
| | libvirt?
| | | | in addition, if your guest has a desktop, please login and
| check
| | if
| | | 
| | | | the network configuration exists issues.
| | | | 
| | | | Thanks,
| | | | Alex
| | | 
| | | Dear Alex ,
| | | 
| | | What logging level is useful for you ? 
| | | 
| | | Dear Rajesh,
| | | 
| | | Level 1 (Debug) should be enough, but I guess it probably hasn't
| | more
| | | help for us,
| | | you had better to login the guest then check network when you
| were
| | | meeting this issue
| | | again, for example, to check if network configuration is valid
| and
| | try
| | | to restart
| | | relevant network services to see if the guest network can work
| | again
| | | or something
| | | like that, In addition, you shut down the guest via running
| 'halt'
| | in
| | | the guest,
| | | Does it work for you if you use libvirt relevant interface such
| as
| | | 'virsh shutdown guest'
| | | or 'virsh destroy guest'?    
| | | 
| | | 
| | | Regards,
| | | Alex
| | | 
| | | 
| | | 
| | | Regards,
| | | Rajesh Kumar Mallah
| | | Tel. 91-11-46710500 (Ext:303)
| | | Cell +919811255597
| | | Website: http://www.tradeindia.com/
| | | \|/ \|/ \|/   stop printing   \|/ \|/ \|/
| | |  |   |   |    start planting   |   |   |

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