linux-kernel - Re: [PATCH] mm/hugetlb: convert hugetlb_change

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Message-ID: <aDeUkLGM9l_twtT-@casper.infradead.org>
Date: Wed, 28 May 2025 23:56:16 +0100
From: Matthew Wilcox <willy@...radead.org>
To: Sidhartha Kumar <sidhartha.kumar@...cle.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	akpm@...ux-foundation.org, muchun.song@...ux.dev, osalvador@...e.de
Subject: Re: [PATCH] mm/hugetlb: convert hugetlb_change_protection() to folios

On Wed, May 28, 2025 at 03:20:13PM -0400, Sidhartha Kumar wrote:
> The for loop inside hugetlb_change_protection() increments by the huge
> page size:
> 
> psize = huge_page_size(h);
> for (; address < end; address += psize)
> 
> so we are operating on the head page of the huge pages between address
> and end. We can safely convert the struct page usage to struct folio.
> 
> Signed-off-by: Sidhartha Kumar <sidhartha.kumar@...cle.com>

Reviewwd-by: Matthew Wilcox (Oracle) <willy@...radead.org>