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

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Message-ID: <20211201033836.4382a474@mail.inbox.lv>
Date:   Wed, 1 Dec 2021 03:38:36 +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

>due to the
>underlying storage.

I agree.

>and send me the trace.out file please?

https://drive.google.com/file/d/1FBjAmXwXakWPPjcn6K-B50S04vyySQO6/view

Typical entries:

           Timer-10841   [006] ..... 14341.639496: mm_vmscan_throttled: nid=0 usec_timeout=100000 usect_delayed=100000 reason=VMSCAN_THROTTLE_WRITEBACK
           gmain-1246    [004] ..... 14341.639498: mm_vmscan_throttled: nid=0 usec_timeout=100000 usect_delayed=100000 reason=VMSCAN_THROTTLE_WRITEBACK
          php7.0-11149   [001] ..... 14341.647498: mm_vmscan_throttled: nid=0 usec_timeout=100000 usect_delayed=100000 reason=VMSCAN_THROTTLE_WRITEBACK
      obfs-local-908     [001] ..... 14341.651510: mm_vmscan_throttled: nid=0 usec_timeout=100000 usect_delayed=100000 reason=VMSCAN_THROTTLE_WRITEBACK
     Web Content-10876   [000] ..... 14341.651522: mm_vmscan_throttled: nid=0 usec_timeout=100000 usect_delayed=100000 reason=VMSCAN_THROTTLE_WRITEBACK
  NetworkManager-812     [004] ..... 14341.667495: mm_vmscan_throttled: nid=0 usec_timeout=100000 usect_delayed=100000 reason=VMSCAN_THROTTLE_WRITEBACK
             tor-941     [000] ..... 14341.667495: mm_vmscan_throttled: nid=0 usec_timeout=100000 usect_delayed=100000 reason=VMSCAN_THROTTLE_WRITEBACK
   IndexedDB #18-11165   [007] ..... 14341.667520: mm_vmscan_throttled: nid=0 usec_timeout=100000 usect_delayed=100000 reason=VMSCAN_THROTTLE_WRITEBACK
           Timer-10755   [002] ..... 14341.667538: mm_vmscan_throttled: nid=0 usec_timeout=100000 usect_delayed=100000 reason=VMSCAN_THROTTLE_WRITEBACK
     JS Watchdog-10884   [000] ..... 14341.699489: mm_vmscan_throttled: nid=0 usec_timeout=100000 usect_delayed=100000 reason=VMSCAN_THROTTLE_WRITEBACK