linux-kernel - Re: [v2 00/11] THP support for zone device page migration

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Message-ID: <xuogc6tjrstage6ezhk4kumqqjr6okogtd6nxdmanyqmhc44r6@eggx4qujdsav>
Date: Thu, 31 Jul 2025 09:18:36 +1000
From: Alistair Popple <apopple@...dia.com>
To: David Hildenbrand <david@...hat.com>
Cc: Balbir Singh <balbirs@...dia.com>, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org, Karol Herbst <kherbst@...hat.com>, Lyude Paul <lyude@...hat.com>, 
	Danilo Krummrich <dakr@...nel.org>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, Jérôme Glisse <jglisse@...hat.com>, 
	Shuah Khan <shuah@...nel.org>, Barry Song <baohua@...nel.org>, 
	Baolin Wang <baolin.wang@...ux.alibaba.com>, Ryan Roberts <ryan.roberts@....com>, 
	Matthew Wilcox <willy@...radead.org>, Peter Xu <peterx@...hat.com>, Zi Yan <ziy@...dia.com>, 
	Kefeng Wang <wangkefeng.wang@...wei.com>, Jane Chu <jane.chu@...cle.com>, 
	Donet Tom <donettom@...ux.ibm.com>, Ralph Campbell <rcampbell@...dia.com>, 
	Mika Penttilä <mpenttil@...hat.com>, Matthew Brost <matthew.brost@...el.com>, 
	Francois Dugast <francois.dugast@...el.com>
Subject: Re: [v2 00/11] THP support for zone device page migration

On Wed, Jul 30, 2025 at 01:30:13PM +0200, David Hildenbrand wrote:
> On 30.07.25 11:21, Balbir Singh wrote:
> 
> BTW, I keep getting confused by the topic.
> 
> Isn't this essentially
> 
> "mm: support device-private THP"
> 
> and the support for migration is just a necessary requirement to *enable*
> device private?

Yes, that's a good point. Migration is one component but there is also fault
handling, etc. so I think calling this "support device-private THP" makes sense.

 - Alistair

> -- 
> Cheers,
> 
> David / dhildenb
>