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xen-devel
Re: [Xen-devel] [Patch] [libxc] add missing free in xc_finish_mmu_update
On Wed, 11 Apr 2007 16:34:07 +0100
Keir Fraser <keir@xxxxxxxxxxxxx> wrote:
> You could work around by stripping all pagetable-type pinning, then
> make updates to all memory pages, then reapply pagetable-type pinning.
> This would mean that your memory rollback code would not need to take
> special account of pagetables.
That was my first approach to solve the problem, but it failed. As far
as I understand it is not that easy because to unpin a frame its
typecount have to be 0. What is the general approach to decrease the
typecount to 0?
Stephan
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