linux-kernel - Re: [RFC PATCH 1/4] mm: pagewalk: add the ability to install PTEs

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Message-ID: <CAG48ez3XwT3aeXRDrW2e_46aAzyQ8iVGr6G7PrMz0KATaJNtew@mail.gmail.com>
Date: Fri, 11 Oct 2024 20:11:28 +0200
From: Jann Horn <jannh@...gle.com>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>, Suren Baghdasaryan <surenb@...gle.com>, 
	"Liam R . Howlett" <Liam.Howlett@...cle.com>, Matthew Wilcox <willy@...radead.org>, 
	Vlastimil Babka <vbabka@...e.cz>, "Paul E . McKenney" <paulmck@...nel.org>, 
	David Hildenbrand <david@...hat.com>, linux-mm@...ck.org, linux-kernel@...r.kernel.org, 
	Muchun Song <muchun.song@...ux.dev>, Richard Henderson <richard.henderson@...aro.org>, 
	Ivan Kokshaysky <ink@...assic.park.msu.ru>, Matt Turner <mattst88@...il.com>, 
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
	"James E . J . Bottomley" <James.Bottomley@...senpartnership.com>, Helge Deller <deller@....de>, 
	Chris Zankel <chris@...kel.net>, Max Filippov <jcmvbkbc@...il.com>, Arnd Bergmann <arnd@...db.de>, 
	linux-alpha@...r.kernel.org, linux-mips@...r.kernel.org, 
	linux-parisc@...r.kernel.org, linux-arch@...r.kernel.org, 
	Shuah Khan <shuah@...nel.org>, Christian Brauner <brauner@...nel.org>, linux-kselftest@...r.kernel.org, 
	Sidhartha Kumar <sidhartha.kumar@...cle.com>
Subject: Re: [RFC PATCH 1/4] mm: pagewalk: add the ability to install PTEs

On Fri, Sep 27, 2024 at 2:51 PM Lorenzo Stoakes
<lorenzo.stoakes@...cle.com> wrote:
> Rather than add yet another implementation, we extend the generic pagewalk
> logic to enable the installation of page table entries by adding a new
> install_pte() callback in mm_walk_ops. If this is specified, then upon
> encountering a missing page table entry, we allocate and install a new one
> and continue the traversal.
[...]
>
> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>

Reviewed-by: Jann Horn <jannh@...gle.com>