Re: [PATCH 06/13] mm/memory: Add dax_insert_pfn

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To: David Hildenbrand <david@xxxxxxxxxx>
Subject: Re: [PATCH 06/13] mm/memory: Add dax_insert_pfn
From: Christoph Hellwig <hch@xxxxxx>
Date: Tue, 2 Jul 2024 13:46:01 +0200
Cc: Alistair Popple <apopple@xxxxxxxxxx>, dan.j.williams@xxxxxxxxx, vishal.l.verma@xxxxxxxxx, dave.jiang@xxxxxxxxx, logang@xxxxxxxxxxxx, bhelgaas@xxxxxxxxxx, jack@xxxxxxx, jgg@xxxxxxxx, catalin.marinas@xxxxxxx, will@xxxxxxxxxx, mpe@xxxxxxxxxxxxxx, npiggin@xxxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, ira.weiny@xxxxxxxxx, willy@xxxxxxxxxxxxx, djwong@xxxxxxxxxx, tytso@xxxxxxx, linmiaohe@xxxxxxxxxx, peterx@xxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, nvdimm@xxxxxxxxxxxxxxx, linux-cxl@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxxxxxx, jhubbard@xxxxxxxxxx, hch@xxxxxx, david@xxxxxxxxxxxxx
In-reply-to: <eb3120fd-44db-4cb3-af3c-a13f9e71380b@redhat.com>
User-agent: Mutt/1.5.17 (2007-11-01)

On Tue, Jul 02, 2024 at 09:18:31AM +0200, David Hildenbrand wrote:
> We have this comparably nasty vmf_insert_mixed() that FS dax abused to 
> insert into !VM_MIXED VMAs. Is that abuse now stopping and are there maybe 
> ways to get rid of vmf_insert_mixed()?

Unfortunately it is also used by a few drm drivers and not just DAX.

Follow-Ups:
- Re: [PATCH 06/13] mm/memory: Add dax_insert_pfn
  - From: David Hildenbrand

References:
- [PATCH 00/13] fs/dax: Fix FS DAX page reference counts
  - From: Alistair Popple
- [PATCH 06/13] mm/memory: Add dax_insert_pfn
  - From: Alistair Popple
- Re: [PATCH 06/13] mm/memory: Add dax_insert_pfn
  - From: David Hildenbrand

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