linux-kernel - Re: [PATCH v6 00/18] Transparent Contiguous PTEs for User Mappings

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Date: Thu, 15 Feb 2024 11:36:23 +0000
From: Mark Rutland <mark.rutland@....com>
To: Ryan Roberts <ryan.roberts@....com>
Cc: Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Ard Biesheuvel <ardb@...nel.org>,
	Marc Zyngier <maz@...nel.org>, James Morse <james.morse@....com>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Matthew Wilcox <willy@...radead.org>,
	David Hildenbrand <david@...hat.com>,
	Kefeng Wang <wangkefeng.wang@...wei.com>,
	John Hubbard <jhubbard@...dia.com>, Zi Yan <ziy@...dia.com>,
	Barry Song <21cnbao@...il.com>,
	Alistair Popple <apopple@...dia.com>,
	Yang Shi <shy828301@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	linux-arm-kernel@...ts.infradead.org, x86@...nel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 00/18] Transparent Contiguous PTEs for User Mappings

On Thu, Feb 15, 2024 at 10:31:47AM +0000, Ryan Roberts wrote:
> Hi All,
> 
> This is a series to opportunistically and transparently use contpte mappings
> (set the contiguous bit in ptes) for user memory when those mappings meet the
> requirements. The change benefits arm64, but there is some (very) minor
> refactoring for x86 to enable its integration with core-mm.

I've looked over each of the arm64-specific patches, and those all seem good to
me. I've thrown my local Syzkaller instance at the series, and I'll shout if
that hits anything that's not clearly a latent issue prior to this series.

The other bits also look good to me, so FWIW, for the series as a whole:

Acked-by: Mark Rutland <mark.rutland@....com>

Mark.