linux-kernel - Re: [PATCH v4 0/4] Make alloc_contig

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Message-ID: <20210317100637.GB16479@linux>
Date:   Wed, 17 Mar 2021 11:06:37 +0100
From:   Oscar Salvador <osalvador@...e.de>
To:     David Hildenbrand <david@...hat.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Michal Hocko <mhocko@...nel.org>,
        Muchun Song <songmuchun@...edance.com>,
        Mike Kravetz <mike.kravetz@...cle.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Anshuman Khandual <anshuman.khandual@....com>
Subject: Re: [PATCH v4 0/4] Make alloc_contig_range handle Hugetlb pages

On Wed, Mar 17, 2021 at 11:05:23AM +0100, Oscar Salvador wrote:
> From e97175b7d4970cbdcbafcf8c398f72a571e817b0 Mon Sep 17 00:00:00 2001
> From: Oscar Salvador <osalvador@...e.de>
> Date: Thu, 18 Mar 2021 05:03:18 +0100
> Subject: [PATCH] mm,page_alloc: Drop unnecesary checks from
>  pfn_range_valid_contig
> 
> pfn_range_valid_contig() bails out when it finds an in-use page or a
> hugetlb page, among other things.
> We can drop the in-use page check since __alloc_contig_pages can migrate
> away those pages, and the hugetlb page check can go too since
> isolate_migratepages_range is now capable of dealing with hugetlb pages.
> 
> Signed-off-by: Oscar Salvador <osalvador@...e.de>

Of course, missing a Suggested-by: David Hildenbrand <david@...hat.com>

 

-- 
Oscar Salvador
SUSE L3