linux-kernel - Re: [PATCH v1 0/9] mm: vm_normal

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Message-Id: <20250716152710.59e09fe5056010322de2a1a3@linux-foundation.org>
Date: Wed, 16 Jul 2025 15:27:10 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: David Hildenbrand <david@...hat.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
 xen-devel@...ts.xenproject.org, linux-fsdevel@...r.kernel.org,
 nvdimm@...ts.linux.dev, Juergen Gross <jgross@...e.com>, Stefano Stabellini
 <sstabellini@...nel.org>, Oleksandr Tyshchenko
 <oleksandr_tyshchenko@...m.com>, Dan Williams <dan.j.williams@...el.com>,
 Matthew Wilcox <willy@...radead.org>, Jan Kara <jack@...e.cz>, Alexander
 Viro <viro@...iv.linux.org.uk>, Christian Brauner <brauner@...nel.org>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, "Liam R. Howlett"
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 <pfalcato@...e.de>, Hugh Dickins <hughd@...gle.com>, Oscar Salvador
 <osalvador@...e.de>, Lance Yang <lance.yang@...ux.dev>
Subject: Re: [PATCH v1 0/9] mm: vm_normal_page*() improvements

On Wed, 16 Jul 2025 10:47:29 +0200 David Hildenbrand <david@...hat.com> wrote:

> > 
> > However the series rejects due to the is_huge_zero_pmd ->
> > is_huge_zero_pfn changes in Luiz's "mm: introduce snapshot_page() v3"
> > series, so could we please have a redo against present mm-new?
> 
> I'm confused: mm-new *still* contains the patch from Luiz series that
> was originally part of the RFC here.
> 
> commit 791cb64cd7f8c2314c65d1dd5cb9e05e51c4cd70
> Author: David Hildenbrand <david@...hat.com>
> Date:   Mon Jul 14 09:16:51 2025 -0400
> 
>      mm/memory: introduce is_huge_zero_pfn() and use it in vm_normal_page_pmd()
> 
> If you want to put this series here before Luiz', you'll have to move that
> single patch as well.
> 
> But probably this series should be done on top of Luiz work, because Luiz
> fixes something.

I'm confused at your confused.  mm-new presently contains Luiz's latest
v3 series "mm: introduce snapshot_page()" which includes a copy of your
"mm/memory: introduce is_huge_zero_pfn() and use it in
vm_normal_page_pmd()".

> [that patch was part of the RFC series, but Luiz picked it up for his work, so I dropped it
> from this series and based it on top of current mm-new]