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Date: Thu, 2 Dec 2021 21:14:56 +0900
From: Alexey Avramov <hakavlad@inbox.lv>
To: Mel Gorman <mgorman@techsingularity.net>
Cc: Andrew Morton <akpm@linux-foundation.org>, Michal Hocko
 <mhocko@suse.com>, Vlastimil Babka <vbabka@suse.cz>, Rik van Riel
 <riel@surriel.com>, Mike Galbraith <efault@gmx.de>, Darrick Wong
 <djwong@kernel.org>, regressions@lists.linux.dev, Linux-fsdevel
 <linux-fsdevel@vger.kernel.org>, Linux-MM <linux-mm@kvack.org>, LKML
 <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/1] mm: vmscan: Reduce throttling due to a failure to
 make progress
Message-ID: <20211202211456.3517014f@mail.inbox.lv>
In-Reply-To: <20211202204229.5ed83f31@mail.inbox.lv>
References: <20211125151853.8540-1-mgorman@techsingularity.net>
	<20211127011246.7a8ac7b8@mail.inbox.lv>
	<20211129150117.GO3366@techsingularity.net>
	<20211201010348.31e99637@mail.inbox.lv>
	<20211130172754.GS3366@techsingularity.net>
	<20211201033836.4382a474@mail.inbox.lv>
	<20211201140005.GU3366@techsingularity.net>
	<20211202204229.5ed83f31@mail.inbox.lv>
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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