linux-kernel - Re: [RFC V1 PATCH mm-hotfixes 2/3] x86/mm: define p*d_populate

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Message-Id: <20250709141359.dc03e32a2319d85a25faaf32@linux-foundation.org>
Date: Wed, 9 Jul 2025 14:13:59 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Harry Yoo <harry.yoo@...cle.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 Andy Lutomirski <luto@...nel.org>, Peter Zijlstra <peterz@...radead.org>,
 Andrey Ryabinin <ryabinin.a.a@...il.com>, Arnd Bergmann <arnd@...db.de>,
 Dennis Zhou <dennis@...nel.org>, Tejun Heo <tj@...nel.org>, Christoph
 Lameter <cl@...two.org>, "H . Peter Anvin" <hpa@...or.com>, Alexander
 Potapenko <glider@...gle.com>, Andrey Konovalov <andreyknvl@...il.com>,
 Dmitry Vyukov <dvyukov@...gle.com>, Vincenzo Frascino
 <vincenzo.frascino@....com>, Juergen Gross <jgross@...e.com>, Kevin Brodsky
 <kevin.brodsky@....com>, Muchun Song <muchun.song@...ux.dev>, Oscar
 Salvador <osalvador@...e.de>, Joao Martins <joao.m.martins@...cle.com>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, Jane Chu
 <jane.chu@...cle.com>, Alistair Popple <apopple@...dia.com>, Mike Rapoport
 <rppt@...nel.org>, Gwan-gyeong Mun <gwan-gyeong.mun@...el.com>,
 "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>, x86@...nel.org,
 linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
 linux-mm@...ck.org, stable@...r.kernel.org
Subject: Re: [RFC V1 PATCH mm-hotfixes 2/3] x86/mm: define
 p*d_populate_kernel() and top-level page table sync

On Wed,  9 Jul 2025 22:16:56 +0900 Harry Yoo <harry.yoo@...cle.com> wrote:

> Fixes: 4917f55b4ef9 ("mm/sparse-vmemmap: improve memory savings for compound devmaps")
> Fixes: faf1c0008a33 ("x86/vmemmap: optimize for consecutive sections in partial populated PMDs")

Fortunately both of these appeared in 6.9-rc7, which minimizes the
problem with having more than one Fixes:.

But still, the Fixes: is a pointer telling -stable maintainers where in
the kernel history we want them to insert the patch(es).  Giving them
multiple insertions points is confusing!  Can we narrow this down
to a single Fixes:?