linux-kernel - Re: [PATCH 1/2] mm/hugetlb: Use a folio in copy_hugetlb_page

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Message-Id: <4D9E2D77-1A94-4A55-843F-C26142666479@linux.dev>
Date:   Fri, 2 Jun 2023 11:14:46 +0800
From:   Muchun Song <muchun.song@...ux.dev>
To:     Peng Zhang <zhangpeng362@...wei.com>
Cc:     Linux Memory Management List <linux-mm@...ck.org>,
        linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>, mike.kravetz@...cle.com,
        sidhartha.kumar@...cle.com, vishal.moola@...il.com,
        wangkefeng.wang@...wei.com, sunnanyong@...wei.com
Subject: Re: [PATCH 1/2] mm/hugetlb: Use a folio in copy_hugetlb_page_range()



> On Jun 2, 2023, at 09:54, Peng Zhang <zhangpeng362@...wei.com> wrote:
> 
> From: ZhangPeng <zhangpeng362@...wei.com>
> 
> We can replace five implict calls to compound_head() with one by using
> pte_folio. However, we still need to keep ptepage because we need to know
> which page in the folio we are copying.
> 
> Suggested-by: Matthew Wilcox (Oracle) <willy@...radead.org>
> Signed-off-by: ZhangPeng <zhangpeng362@...wei.com>

Reviewed-by: Muchun Song <songmuchun@...edance.com>

Thanks.