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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 01 Dec 2021 14:52:01 +0100
From:   Mike Galbraith <efault@....de>
To:     Mel Gorman <mgorman@...hsingularity.net>
Cc:     Alexey Avramov <hakavlad@...ox.lv>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Rik van Riel <riel@...riel.com>,
        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

On Wed, 2021-12-01 at 13:01 +0000, Mel Gorman wrote:
> On Tue, Nov 30, 2021 at 06:59:58PM +0100, Mike Galbraith wrote:
> > On Tue, 2021-11-30 at 17:27 +0000, Mel Gorman wrote:
> > >
> > > Obviously a fairly different experience and most likely due to
> > > the
> > > underlying storage.
> >
> > I bet a virtual nickle this is the sore spot.
> >
>
> You win a virtual nickle!

I'm rich I'm rich... oh dang, virtual.

I went back to 5.15, and confirmed that wait_iff_congested() did not
ever sleep with the try to eat /dev/zero load.  Nor did it with insane
overcommit swap storm from hell with as much IO going on as my little
box is capable of generating, making the surrounding congestion bits
look.. down right expendable.

	-Mike