linux-kernel - Re: [PATCH 1/1] mm: vmscan: Reduce throttling due to a failure to make progress

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Date:   Thu, 2 Dec 2021 21:14:56 +0900
From:   Alexey Avramov <hakavlad@...ox.lv>
To:     Mel Gorman <mgorman@...hsingularity.net>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Rik van Riel <riel@...riel.com>,
        Mike Galbraith <efault@....de>,
        Darrick Wong <djwong@...nel.org>, regressions@...ts.linux.dev,
        Linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] mm: vmscan: Reduce throttling due to a failure to
 make progress

and trace.out with swappiness=0:

typical entries:

 Chrome_~dThread-3463    [003] .....  5492.490187: mm_vmscan_throttled: nid=0 usec_timeout=20000 usect_delayed=4000 reason=VMSCAN_THROTTLE_ISOLATED
 DNS Res~ver #12-5720    [005] .....  5492.490207: mm_vmscan_throttled: nid=0 usec_timeout=20000 usect_delayed=4000 reason=VMSCAN_THROTTLE_ISOLATED
            tail-6015    [001] .....  5492.490545: mm_vmscan_throttled: nid=0 usec_timeout=20000 usect_delayed=4000 reason=VMSCAN_THROTTLE_ISOLATED

https://drive.google.com/file/d/1oXOVPFyNmDe2-PFUIAMHMPffZo1N_7vl/view