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

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Message-ID: <1fa09b2c-4845-445f-9343-3a169e202ac5@nvidia.com>
Date: Thu, 31 Jul 2025 18:41:04 +1000
From: Balbir Singh <balbirs@...dia.com>
To: David Hildenbrand <david@...hat.com>, linux-mm@...ck.org
Cc: 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>,
 Alistair Popple <apopple@...dia.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 7/30/25 21:30, 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?
> 

I agree, I can change the title, but the focus of the use case is to
support THP migration for improved latency and throughput. All of that
involves support of device-private THP

Balbir Singh