Re: [Xen-devel] Fast checkpoints with COW VM memory

[Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>]

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

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