linux-kernel - Re: [PATCH v1 00/11] mm: rewrite pfnmap tracking and remove VM

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Message-ID: <c69f782b-798d-459d-b7fb-c2d7c7e30372@redhat.com>
Date: Fri, 25 Apr 2025 11:27:00 +0200
From: David Hildenbrand <david@...hat.com>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, x86@...nel.org,
 intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
 linux-trace-kernel@...r.kernel.org, Dave Hansen
 <dave.hansen@...ux.intel.com>, Andy Lutomirski <luto@...nel.org>,
 Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>,
 Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
 "H. Peter Anvin" <hpa@...or.com>, Jani Nikula <jani.nikula@...ux.intel.com>,
 Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
 Rodrigo Vivi <rodrigo.vivi@...el.com>, Tvrtko Ursulin
 <tursulin@...ulin.net>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>, Andrew Morton <akpm@...ux-foundation.org>,
 Steven Rostedt <rostedt@...dmis.org>, Masami Hiramatsu
 <mhiramat@...nel.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 "Liam R. Howlett" <Liam.Howlett@...cle.com>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 Vlastimil Babka <vbabka@...e.cz>, Jann Horn <jannh@...gle.com>,
 Pedro Falcato <pfalcato@...e.de>, Peter Xu <peterx@...hat.com>
Subject: Re: [PATCH v1 00/11] mm: rewrite pfnmap tracking and remove VM_PAT

>> There will be some clash with [1], but nothing that cannot be sorted out
>> easily by moving the functions added to kernel/fork.c to wherever the vma
>> bits will live.
>>
>> Briefly tested with some basic /dev/mem test I crafted. I want to convert
>> them to selftests, but that might or might not require a bit of
>> more work (e.g., /dev/mem accessibility).
> 
> So for the x86 bits, once it passes review by the fine MM folks:
> 
>    Acked-by: Ingo Molnar <mingo@...nel.org>
> 

Thanks!

> And I suppose this rewrite will be carried in -mm?

Yes, will make conflicts with Lorenzo's work easier to resolve (in 
whatever order this ends up going in). I suspect there are not many PAT 
related things on the horizon.

-- 
Cheers,

David / dhildenb