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[Bug 2024334] [NEW] Can we don't do unplug_vifs and plug_vifs when start vm?

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: shews <2024334@xxxxxxxxxxxxxxxxxx>
Date: Mon, 19 Jun 2023 02:59:23 -0000
Reply-to: Bug 2024334 <2024334@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx

Public bug reported:

Hello all.
Now we use hard_reboot to do vm start.I think this is unnecessary, especially for the unplug_vifs and plug_vifs action, which will waste a lot of time and is even more unnecessary.

Can we optimize the code for vm start(the power_on function at
virt/libvirt/driver.py), let it don't do unplug_vifs and plug_vifs, so
that we can shorten the vm start time?

Is there any problem with this change? Can someone give some
suggestions?

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2024334

Title:
  Can we don't do unplug_vifs and plug_vifs when start vm?

Status in OpenStack Compute (nova):
  New

Bug description:
  Hello all.
  Now we use hard_reboot to do vm start.I think this is unnecessary, especially for the unplug_vifs and plug_vifs action, which will waste a lot of time and is even more unnecessary.

  Can we optimize the code for vm start(the power_on function at
  virt/libvirt/driver.py), let it don't do unplug_vifs and plug_vifs, so
  that we can shorten the vm start time?

  Is there any problem with this change? Can someone give some
  suggestions?

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