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Date: Fri, 21 Nov 2025 10:36:36 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Chunyan Zhang <zhangchunyan@iscas.ac.cn>, Paul Walmsley
 <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Rob
 Herring <robh@kernel.org>, Krzysztof Kozlowski <krzk+dt@kernel.org>,
 Alexander Viro <viro@zeniv.linux.org.uk>, linux-mm@kvack.org, Peter Xu
 <peterx@redhat.com>, Arnd Bergmann <arnd@arndb.de>, David Hildenbrand
 <david@redhat.com>, "Liam R . Howlett" <Liam.Howlett@oracle.com>, Vlastimil
 Babka <vbabka@suse.cz>, Mike Rapoport <rppt@kernel.org>, Suren Baghdasaryan
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 <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
 linux-kernel@vger.kernel.org, Chunyan Zhang <zhang.lyra@gmail.com>
Subject: Re: [PATCH V15 1/6] mm: softdirty: Add
 pgtable_supports_soft_dirty()
Message-Id: <20251121103636.22321ceb37093370e59cb6e1@linux-foundation.org>
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On Fri, 21 Nov 2025 16:57:17 +0000 Lorenzo Stoakes <lorenzo.stoakes@oracle.com> wrote:

> This breaks the VMA tests. Don't worry it's not exactly an obvious thing.
> 
> You can test this via:
> 
> $ cd tools/testing/vma
> $ make && ./vma
> 
> (Currently we also have another breakage too which I'll chase up separately.)
> 
> Andrew - Could we simply apply the attached fix-patch?
> 
> I know this is in mm-stable now so ugh maybe we'll have some commits where VMA
> tests are broken (not nice for bisection), but anyway we need to fix this even
> so even if it has to be a follow up patch.

"mm: softdirty: add pgtable_supports_soft_dirty()" is still in
mm-unstable so all is good.