linux-kernel - Re: [PATCH 5/6] mm/page_alloc: Limit the number of pages on PCP lists when reclaim is active

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Message-ID: <e839f84f-0cc2-2e6a-70c8-99c0d6b8ddf8@suse.cz>
Date:   Fri, 28 May 2021 13:43:25 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Mel Gorman <mgorman@...hsingularity.net>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Hillf Danton <hdanton@...a.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Michal Hocko <mhocko@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>
Subject: Re: [PATCH 5/6] mm/page_alloc: Limit the number of pages on PCP lists
 when reclaim is active

On 5/25/21 10:01 AM, Mel Gorman wrote:
> When kswapd is active then direct reclaim is potentially active. In
> either case, it is possible that a zone would be balanced if pages were
> not trapped on PCP lists. Instead of draining remote pages, simply limit
> the size of the PCP lists while kswapd is active.
> 
> Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>

Acked-by: Vlastimil Babka <vbabka@...e.cz>