From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tim Deegan <tim@xen.org>
Subject: [PATCH 0/4] x86/hvm: RTC periodic timer adjustments
Date: Thu, 28 Mar 2013 13:22:12 +0000
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Cc: suravee.suthikulpanit@amd.com, JBeulich@suse.com
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With these four patches, the time drift that was happening on Windows XP
guests goes away, at least in my testing.  4/4 is probably the most
important (with the other three, I still see slow drift), but the others
all seem like a good idea to me. 

1/4 is just a bit of tidying, untangling the IRQ masking logic.
2/4 is the same patch I posted before, to keep the periods aligned.
3/4 avoids calling create_periodic_time() when it's already running.
4/4 holds off disabling the timer for a few ticks, while still
    disabling it if the guest is obviously ignoring the IRQ.

Cheers,

Tim.