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Re: [Xen-devel] Hypervisor architecture?

  • To: taskstructfromhell@xxxxxxxxxxxxxx
  • From: George Dunlap <dunlapg@xxxxxxxxx>
  • Date: Fri, 7 May 2010 10:05:18 -0500
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Etienne Martineau <etmartin@xxxxxxxxx>
  • Delivery-date: Fri, 07 May 2010 08:06:09 -0700
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On Tue, May 4, 2010 at 6:20 PM, TSFH <taskstructfromhell@xxxxxxxxxxxxxx> wrote:
> It would also be useful if someone on this list who have read the book
> could enlighten the community WRT possible caveats on the book or parts
> that no longer resemble the current implementation, as it appears Xen
> has changed considerably since the book was released.

I haven't read the book, but we have had several people come to the
list to try to get help getting the "pluggable scheduler" example from
the book working.  The two caveats are:
* The example code, as it's written in the book, doesn't actually work
* The scheduler is actually a lot harder than it looks.  It's at one
of the very lowest layers.  If there's a bug, the whole system hangs
(as opposed to just returning an error message).  Debugging it takes a
lot of skill.  So it's not a good place to start playing around with
Xen. :-)


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