linux-kernel - Re: [v6 02/15] mm/huge_memory: add device-private THP support to PMD operations

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Message-ID: <bfede7e3-5295-4453-928f-8e7c0bf8f2cd@redhat.com>
Date: Tue, 23 Sep 2025 10:37:01 +0200
From: David Hildenbrand <david@...hat.com>
To: Balbir Singh <balbirs@...dia.com>, Zi Yan <ziy@...dia.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, damon@...ts.linux.dev,
 dri-devel@...ts.freedesktop.org, Matthew Brost <matthew.brost@...el.com>,
 Joshua Hahn <joshua.hahnjy@...il.com>, Rakie Kim <rakie.kim@...com>,
 Byungchul Park <byungchul@...com>, Gregory Price <gourry@...rry.net>,
 Ying Huang <ying.huang@...ux.alibaba.com>,
 Alistair Popple <apopple@...dia.com>, Oscar Salvador <osalvador@...e.de>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 Baolin Wang <baolin.wang@...ux.alibaba.com>,
 "Liam R. Howlett" <Liam.Howlett@...cle.com>, Nico Pache <npache@...hat.com>,
 Ryan Roberts <ryan.roberts@....com>, Dev Jain <dev.jain@....com>,
 Barry Song <baohua@...nel.org>, Lyude Paul <lyude@...hat.com>,
 Danilo Krummrich <dakr@...nel.org>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>, Ralph Campbell <rcampbell@...dia.com>,
 Mika Penttilä <mpenttil@...hat.com>,
 Francois Dugast <francois.dugast@...el.com>
Subject: Re: [v6 02/15] mm/huge_memory: add device-private THP support to PMD
 operations

>>
>> non_present seems too vague. Maybe just open code it.
> 
> This was David's suggestion from the previous posting, there is is_swap_pfn_entry()
> but it's much larger than we would like for our use case.

Right. If we can find a better name, great, but open coding this turned 
out nasty.

-- 
Cheers

David / dhildenb