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]

Message-ID: <20211202121554.GY3366@techsingularity.net>
Date:   Thu, 2 Dec 2021 12:15:54 +0000
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     Alexey Avramov <hakavlad@...ox.lv>
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

On Thu, Dec 02, 2021 at 08:42:29PM +0900, Alexey Avramov wrote:
> I tested this [1] patch on top of 5.16-rc2, the same tests.
> 

Thanks for all the tests you've done for this, it's much appreciated.

> - with noswap:
> 
> 2021-12-02 19:41:19,279: Stall times for the last 146.5s:
> 2021-12-02 19:41:19,279: -----------
> 2021-12-02 19:41:19,279: some cpu     1.1s, avg 0.8%
> 2021-12-02 19:41:19,279: -----------
> 2021-12-02 19:41:19,279: some io      116.2s, avg 79.3%
> 2021-12-02 19:41:19,280: full io      109.6s, avg 74.8%
> 2021-12-02 19:41:19,280: -----------
> 2021-12-02 19:41:19,280: some memory  3.9s, avg 2.6%
> 2021-12-02 19:41:19,280: full memory  3.8s, avg 2.6%
> 
> Excellent!
> 
> psi log:
> https://raw.githubusercontent.com/hakavlad/cache-tests/main/516-reclaim-throttle/516-rc2/patch6/noswap/psi
> 
> mem log:
> https://raw.githubusercontent.com/hakavlad/cache-tests/main/516-reclaim-throttle/516-rc2/patch6/noswap/mem
> 
> - with swappiness=0
> 
> 2021-12-02 19:46:04,860: Stall times for the last 144.5s:
> 2021-12-02 19:46:04,860: -----------
> 2021-12-02 19:46:04,860: some cpu     1.1s, avg 0.8%
> 2021-12-02 19:46:04,860: -----------
> 2021-12-02 19:46:04,860: some io      106.9s, avg 74.0%
> 2021-12-02 19:46:04,861: full io      101.3s, avg 70.1%
> 2021-12-02 19:46:04,861: -----------
> 2021-12-02 19:46:04,861: some memory  99.6s, avg 68.9%
> 2021-12-02 19:46:04,861: full memory  95.6s, avg 66.2%
> 
> PSI mem pressure was high, but there were no long stalls.
> 

Great, so can I assume you're ok with this version? If yes, can I add
the following?

Tested-by: Alexey Avramov <hakavlad@...ox.lv>

-- 
Mel Gorman
SUSE Labs