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RE: [Xen-devel] Domain save/migrate issue

  • To: "Anthony Liguori" <aliguori@xxxxxxxxxx>
  • From: "Noam Taich" <noam.taich@xxxxxxxxxxxx>
  • Date: Wed, 15 Feb 2006 01:32:56 -0800
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Wed, 15 Feb 2006 09:45:21 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcYxdsWEjhT57CQySx+jrYWuI2kiZQAmeQMA
  • Thread-topic: [Xen-devel] Domain save/migrate issue

My mentioning of the shared pages has brought up something else:
How LIVE can the live migration become?

What I mean is this:

Right before the last iteration of the main xc_linux_save() main while
The domain is suspended. After the loop, the shared info pages are

So, interrupts would be ignored, as xen won't send them to a shutdown

Seems obvious, but my point is that should there be a way to get xen out
of suspended state, another improvement can be made:

Xen can be made to write to event channels of suspended domains (up to a
certain limit, and that capability can be turned on or off to finish
things off...)
Won't that mean that it would mean a lot less interrupts are lost?
The migration would be even more LIVE.

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