linux-kernel - Re: [PATCH] mm: page_alloc: Skip regions with hugetlbfs pages when allocating 1G pages

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Message-Id: <20230414124617.c53cf4ce606cdcba54f65aa2@linux-foundation.org>
Date:   Fri, 14 Apr 2023 12:46:17 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Mel Gorman <mgorman@...hsingularity.net>
Cc:     Vlastimil Babka <vbabka@...e.cz>, Michal Hocko <mhocko@...e.com>,
        Oscar Salvador <OSalvador@...e.com>,
        Yuanxi Liu <y.liu@...uida.com>,
        David Hildenbrand <david@...hat.com>,
        Matthew Wilcox <willy@...radead.org>,
        Linux-MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm: page_alloc: Skip regions with hugetlbfs pages when
 allocating 1G pages

On Fri, 14 Apr 2023 15:14:29 +0100 Mel Gorman <mgorman@...hsingularity.net> wrote:

> A bug was reported by Yuanxi Liu where allocating 1G pages at runtime is
> taking an excessive amount of time for large amounts of memory.
>
> ...
>
>                    6.3.0-rc6   6.3.0-rc6   6.3.0-rc6
>                      vanilla   revert-v1   hugeallocfix-v2
> Duration User           0.28        0.27        0.30
> Duration System       808.66       17.77       35.99
> Duration Elapsed      830.87       18.08       36.33
> 

I'll put a cc:stable on this.