linux-kernel - RE: [RFC PATCH v1 4/4] mm/gup: flag to limit follow

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Message-ID: <DB7PR02MB3979E3D361EC89D30416FACABB5A0@DB7PR02MB3979.eurprd02.prod.outlook.com>
Date:   Wed, 11 Dec 2019 17:13:57 +0000
From:   Mircea CIRJALIU - MELIU <mcirjaliu@...defender.com>
To:     "Kirill A. Shutemov" <kirill@...temov.name>
CC:     "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jerome Glisse <jglisse@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        "aarcange@...hat.com" <aarcange@...hat.com>
Subject: RE: [RFC PATCH v1 4/4] mm/gup: flag to limit follow_page() to
 transhuge pages

> On Wed, Dec 11, 2019 at 09:29:19AM +0000, Mircea CIRJALIU - MELIU wrote:
> > Sometimes the user needs to look up a transhuge page mapped at a given
> address.
> 
> There is no such examples in the current kernel, right?

This is a helper patch for remote mapping main patch.
It helps to establish an exact mirror of another process page table.
And exact also involves huge mappings.

> 
> --
>  Kirill A. Shutemov
> 
> ________________________
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