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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:JA">Hi, Fawad,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:JA">></span><span lang="EN-US"> Can you please share the link?</span><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:JA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:JA"><a href="https://blueprints.launchpad.net/nova/+spec/direct-pci-passthrough-live-migration">https://blueprints.launchpad.net/nova/+spec/direct-pci-passthrough-live-migration</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:JA">Thanks in advance.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:JA">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:JA">xiexs<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Fawad Khaliq [mailto:fawad@plumgrid.com]
<br>
<b>Sent:</b> Tuesday, February 16, 2016 1:19 PM<br>
<b>To:</b> OpenStack Development Mailing List (not for usage questions)<br>
<b>Subject:</b> Re: [openstack-dev] [nova][neutron] New BP for live migration with direct pci passthru<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">On Mon, Feb 1, 2016 at 3:25 PM, Xie, Xianshan <<a href="mailto:xiexs@cn.fujitsu.com" target="_blank">xiexs@cn.fujitsu.com</a>> wrote:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hi, all,<br>
  I have registered a new BP about the live migration with a direct pci passthru device.<br>
  Could you please help me to review it? Thanks in advance.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Can you please share the link? <o:p></o:p></span></p>
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The following is the details:<br>
----------------------------------------------------------------------------------<br>
SR-IOV has been supported for a long while, in the community's point of view,<br>
the pci passthru with Macvtap can be live migrated possibly, but the direct pci passthru<br>
seems hard to implement the migration as the passthru VF is totally controlled by<br>
the VMs so that some internal states may be unknown by the hypervisor.<br>
<br>
But we think the direct pci passthru model can also be live migrated with the<br>
following combination of a series of technology/operation based on the enhanced<br>
Qemu-Geust-Agent(QGA) which has already been supported by nova.<br>
   1)Bond the direct pci passthru NIC with a virtual NIC.<br>
     This will keep the network connectivity during the live migration.<br>
   2)Unenslave the direct pci passthru NIC<br>
   3)Hot-unplug the direct pci passthru NIC<br>
   4)Live-migrate guest with the virtual NIC<br>
   5)Hot-plug the direct pci passthru NIC on the target host<br>
   6)Enslave the direct pci passthru NIC<br>
<br>
And more inforation about this concept can refer to [1].<br>
[1]<a href="https://www.kernel.org/doc/ols/2008/ols2008v2-pages-261-267.pdf" target="_blank">https://www.kernel.org/doc/ols/2008/ols2008v2-pages-261-267.pdf</a><br>
----------------------------------------------------------------------------------<br>
<br>
Best regards,<br>
Xiexs<br>
<br>
<br>
<br>
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