linux-kernel - Re: [PATCH 2/7] mm: introduce local state for lazy

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Message-ID: <e6072568-1b98-4a7f-8d30-65417a440bb7@lucifer.local>
Date: Fri, 5 Sep 2025 12:37:14 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Kevin Brodsky <kevin.brodsky@....com>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Andreas Larsson <andreas@...sler.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        David Hildenbrand <david@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Jann Horn <jannh@...gle.com>, Juergen Gross <jgross@...e.com>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Madhavan Srinivasan <maddy@...ux.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>, Michal Hocko <mhocko@...e.com>,
        Mike Rapoport <rppt@...nel.org>, Nicholas Piggin <npiggin@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ryan Roberts <ryan.roberts@....com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>, Vlastimil Babka <vbabka@...e.cz>,
        Will Deacon <will@...nel.org>, linux-arm-kernel@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org, sparclinux@...r.kernel.org,
        xen-devel@...ts.xenproject.org
Subject: Re: [PATCH 2/7] mm: introduce local state for lazy_mmu sections

On Fri, Sep 05, 2025 at 12:21:40PM +0100, Lorenzo Stoakes wrote:
> You should really base on mm-new.
>
> You need to account for everything that is potentially going to go
> upstream. mm-stable is generally not actually populated all too well until
> shortly before merge window anyway.

Just to note that mm-unstable is also fine. Despite its name, it's substantially
more stable than mm-new, which can even break the build and appears to have no
checks performed on it at all.

But mm-new is the most uptodate version of all the mm code.

Thanks, Lorenzo