linux-kernel - Re: [PATCH 1/6] mm/page_alloc: Fetch the correct pcp buddy during bulk free

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Message-ID: <Yg2oLQTRt0ZhEXar@ziqianlu-nuc9qn>
Date:   Thu, 17 Feb 2022 09:43:09 +0800
From:   Aaron Lu <aaron.lu@...el.com>
To:     Mel Gorman <mgorman@...hsingularity.net>
CC:     Andrew Morton <akpm@...ux-foundation.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Michal Hocko <mhocko@...nel.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>
Subject: Re: [PATCH 1/6] mm/page_alloc: Fetch the correct pcp buddy during
 bulk free

On Thu, Feb 17, 2022 at 12:22:22AM +0000, Mel Gorman wrote:
> free_pcppages_bulk() prefetches buddies about to be freed but the
> order must also be passed in as PCP lists store multiple orders.
> 
> Fixes: 44042b449872 ("mm/page_alloc: allow high-order pages to be stored on the per-cpu lists")
> Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>
> Reviewed-by: Vlastimil Babka <vbabka@...e.cz>

Reviewed-by: Aaron Lu <aaron.lu@...el.com>