linux-kernel - Re: [PATCH V12 0/5] riscv: mm: Add soft-dirty and uffd-wp support

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Message-ID: <2b13e434-192a-451c-a09b-69eb92392a3e@redhat.com>
Date: Mon, 15 Sep 2025 15:45:46 +0200
From: David Hildenbrand <david@...hat.com>
To: Chunyan Zhang <zhangchunyan@...as.ac.cn>,
 linux-riscv@...ts.infradead.org, linux-fsdevel@...r.kernel.org,
 linux-mm@...ck.org, linux-kernel@...r.kernel.org
Cc: Paul Walmsley <paul.walmsley@...ive.com>,
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
 Alexandre Ghiti <alex@...ti.fr>, Deepak Gupta <debug@...osinc.com>,
 Ved Shanbhogue <ved@...osinc.com>, Alexander Viro <viro@...iv.linux.org.uk>,
 Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
 Andrew Morton <akpm@...ux-foundation.org>, Peter Xu <peterx@...hat.com>,
 Arnd Bergmann <arnd@...db.de>, Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 "Liam R . Howlett" <Liam.Howlett@...cle.com>,
 Vlastimil Babka <vbabka@...e.cz>, Mike Rapoport <rppt@...nel.org>,
 Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>,
 Axel Rasmussen <axelrasmussen@...gle.com>, Yuanchu Xie <yuanchu@...gle.com>,
 Chunyan Zhang <zhang.lyra@...il.com>
Subject: Re: [PATCH V12 0/5] riscv: mm: Add soft-dirty and uffd-wp support

On 15.09.25 12:13, Chunyan Zhang wrote:
> This patchset adds support for Svrsw60t59b [1] extension which is ratified now,
> also add soft dirty and userfaultfd write protect tracking for RISC-V.
> 
> The patches 1 and 2 add macros to allow architectures to define their own checks
> if the soft-dirty / uffd_wp PTE bits are available, in other words for RISC-V,
> the Svrsw60t59b extension is supported on which device the kernel is running.
> 
> This patchset has been tested with kselftest mm suite in which soft-dirty,
> madv_populate, test_unmerge_uffd_wp, and uffd-unit-tests run and pass,
> and no regressions are observed in any of the other tests.
> 
> This patchset applies on top of v6.17-rc6.

What are the plans for this series? It fails to apply on top of 
mm-unstable / mm-new, so likely merge conflicts when merging through 
another tree.

Likely best to base this on mm-new and route it through the MM tree?

-- 
Cheers

David / dhildenb