From mboxrd@z Thu Jan  1 00:00:00 1970
From: Samuel Thibault <samuel.thibault@eu.citrix.com>
Subject: Re: Fast checkpoints with COW VM memory
Date: Tue, 5 Feb 2008 10:39:50 +0000
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To: Mike Sun <msun@gatech.edu>
Cc: xen-devel@lists.xensource.com, Tim Deegan <Tim.Deegan@citrix.com>
List-Id: xen-devel@lists.xenproject.org

Mike Sun, le Mon 04 Feb 2008 22:14:26 -0500, a écrit :
> is there a way for me to determine if the protection fault is the
> result my my COW action as opposed to a protection fault actually
> incurred by the guest (i.e. perhaps the guest OS is implementing its
> own COW on portions of its memory)?

Not that I'm aware of.

> The only method I can think of is to keep track of the
> protection bits of the pages before I have the hypervisor modify them
> to read only,

Yes.

Samuel