linux-kernel - Re: [PATCH v2 4/4] vfio-pci: Best-effort huge pfnmaps with !MAP

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Message-ID: <aTZB3VFArpJJMKMN@devgpu015.cco6.facebook.com>
Date: Sun, 7 Dec 2025 19:11:25 -0800
From: Alex Mastro <amastro@...com>
To: Peter Xu <peterx@...hat.com>
CC: <kvm@...r.kernel.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, Jason Gunthorpe <jgg@...dia.com>,
        Nico Pache
	<npache@...hat.com>, Zi Yan <ziy@...dia.com>,
        David Hildenbrand
	<david@...hat.com>,
        Alex Williamson <alex@...zbot.org>, Zhi Wang
	<zhiw@...dia.com>,
        David Laight <david.laight.linux@...il.com>,
        Yi Liu
	<yi.l.liu@...el.com>, Ankit Agrawal <ankita@...dia.com>,
        Kevin Tian
	<kevin.tian@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2 4/4] vfio-pci: Best-effort huge pfnmaps with
 !MAP_FIXED mappings

On Thu, Dec 04, 2025 at 10:10:03AM -0500, Peter Xu wrote:
> To achieve that, a custom vfio_device's get_mapping_hint() for vfio-pci
> devices is needed.

nit get_mapping_order()