linux-kernel - Re: [PATCH v3 03/11] mm/page_table_check: Batch-check pmds/puds just like ptes

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Message-ID: <Z-7zo5ahsqLaKxUX@arm.com>
Date: Thu, 3 Apr 2025 21:46:27 +0100
From: Catalin Marinas <catalin.marinas@....com>
To: Ryan Roberts <ryan.roberts@....com>
Cc: Will Deacon <will@...nel.org>,
	Pasha Tatashin <pasha.tatashin@...een.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Uladzislau Rezki <urezki@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	David Hildenbrand <david@...hat.com>,
	"Matthew Wilcox (Oracle)" <willy@...radead.org>,
	Mark Rutland <mark.rutland@....com>,
	Anshuman Khandual <anshuman.khandual@....com>,
	Alexandre Ghiti <alexghiti@...osinc.com>,
	Kevin Brodsky <kevin.brodsky@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 03/11] mm/page_table_check: Batch-check pmds/puds just
 like ptes

On Tue, Mar 04, 2025 at 03:04:33PM +0000, Ryan Roberts wrote:
> Convert page_table_check_p[mu]d_set(...) to
> page_table_check_p[mu]ds_set(..., nr) to allow checking a contiguous set
> of pmds/puds in single batch. We retain page_table_check_p[mu]d_set(...)
> as macros that call new batch functions with nr=1 for compatibility.
> 
> arm64 is about to reorganise its pte/pmd/pud helpers to reuse more code
> and to allow the implementation for huge_pte to more efficiently set
> ptes/pmds/puds in batches. We need these batch-helpers to make the
> refactoring possible.
> 
> Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>
> Signed-off-by: Ryan Roberts <ryan.roberts@....com>

Reviewed-by: Catalin Marinas <catalin.marinas@....com>