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Re: [Xen-devel] [PATCH v2 for-4.10] x86/mm: Make PV linear pagetables optional



On Wed, Oct 18, 2017 at 11:51:59AM +0100, George Dunlap wrote:
> Allowing pagetables to point to other pagetables of the same level
> (often called 'linear pagetables') has been included in Xen since its
> inception; but recently it has been the source of a number of subtle
> reference-counting bugs.
> 
> It is not used by Linux or MiniOS; but it used used by NetBSD and

"it used used" here.

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