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From: Mel Gorman <mgorman@techsingularity.net>
To: Mike Galbraith <efault@gmx.de>
Cc: Alexey Avramov <hakavlad@inbox.lv>,
	Andrew Morton <akpm@linux-foundation.org>,
	Michal Hocko <mhocko@suse.com>, Vlastimil Babka <vbabka@suse.cz>,
	Rik van Riel <riel@surriel.com>, 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
Date: Mon, 29 Nov 2021 08:26:55 +0000	[thread overview]
Message-ID: <20211129082654.GM3366@techsingularity.net> (raw)
In-Reply-To: <252cd5acd9bf6588ec87ce02884925c737b6a8b7.camel@gmx.de>

On Sun, Nov 28, 2021 at 11:00:59AM +0100, Mike Galbraith wrote:
> On Sun, 2021-11-28 at 04:26 +0900, Alexey Avramov wrote:
> > I will present the results of the new tests here.
> >
> > TLDR;
> > =====
> > No one Mel's patch doesn't prevent stalls in my tests.
> 
> Seems there may be a problem with the THROTTLE_WRITEBACK bits..
> 
> > $ for i in {1..10}; do tail /dev/zero; done
> > -- 1. with noswap
> 
> ..because the bandaid below (made of 8cd7c588 shards) on top of Mel's
> last pulled that one-liner's very pointy fangs.
> 

This disables writeback throttling in most cases as bdi congested is not
updated by the block layer.

-- 
Mel Gorman
SUSE Labs

  parent reply	other threads:[~2021-11-29  8:35 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-25 15:18 [PATCH 1/1] mm: vmscan: Reduce throttling due to a failure to make progress Mel Gorman
2021-11-26 10:14 ` Vlastimil Babka
2021-11-26 10:26 ` Mike Galbraith
2021-11-26 16:12 ` Alexey Avramov
2021-11-26 16:52   ` Mel Gorman
2021-11-27 19:26     ` Alexey Avramov
2021-11-28 10:00       ` Mike Galbraith
2021-11-28 11:39         ` Mike Galbraith
2021-11-28 12:35           ` Mike Galbraith
2021-11-28 18:38             ` Mike Galbraith
2021-11-28 11:58         ` Alexey Avramov
2021-11-29  8:26         ` Mel Gorman [this message]
2021-11-29 15:01   ` Mel Gorman
2021-11-30 10:14     ` Mike Galbraith
2021-11-30 11:22       ` Mel Gorman
2021-11-30 12:00         ` Mike Galbraith
2021-11-30 12:51           ` Mike Galbraith
2021-11-30 13:09             ` Mel Gorman
2021-12-01  4:32               ` Mike Galbraith
2021-11-30 16:03     ` Alexey Avramov
2021-11-30 17:27       ` Mel Gorman
2021-11-30 17:59         ` Mike Galbraith
2021-12-01 13:01           ` Mel Gorman
2021-12-01 13:52             ` Mike Galbraith
2021-12-01 15:06               ` Mel Gorman
2021-11-30 18:38         ` Alexey Avramov
2021-12-01 14:00           ` Mel Gorman
2021-12-01 17:29             ` Darrick J. Wong
2021-12-02  9:43               ` Mel Gorman
2021-12-02 16:09                 ` Darrick J. Wong
2021-12-02  3:11             ` Mike Galbraith
2021-12-02 10:13               ` Mel Gorman
2021-12-02 10:51                 ` Mike Galbraith
2021-12-02 11:42             ` Alexey Avramov
2021-12-02 12:14               ` Alexey Avramov
2021-12-02 12:15               ` Mel Gorman
2021-12-02 12:22                 ` Alexey Avramov
2021-12-02 13:18 Mel Gorman
2021-12-02 14:51 ` kernel test robot
2021-12-02 14:51   ` kernel test robot
2021-12-02 16:02 ` kernel test robot
2021-12-02 16:02   ` kernel test robot

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