linux-kernel - Re: [tip:sched/eevdf] [sched/fair] e0c2ff903c: phoronix-test-suite.blogbench.Write.final

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: <ZORexC0xTjm1LlWA@chenyu5-mobl2>
Date:   Tue, 22 Aug 2023 15:07:48 +0800
From:   Chen Yu <yu.c.chen@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Mike Galbraith <umgwanakikbuti@...il.com>
CC:     kernel test robot <oliver.sang@...el.com>,
        <oe-lkp@...ts.linux.dev>, <lkp@...el.com>,
        <linux-kernel@...r.kernel.org>, <x86@...nel.org>,
        "Ingo Molnar" <mingo@...nel.org>,
        K Prateek Nayak <kprateek.nayak@....com>,
        "Feng Tang" <feng.tang@...el.com>
Subject: Re: [tip:sched/eevdf] [sched/fair]  e0c2ff903c:
 phoronix-test-suite.blogbench.Write.final_score -34.8% regression

On 2023-08-22 at 14:48:50 +0800, Chen Yu wrote:
> Hi Peter, Mike,
> 
> On 2023-08-18 at 09:09:29 +0800, Chen Yu wrote:
> > On 2023-08-16 at 15:40:59 +0200, Peter Zijlstra wrote:
> > > On Wed, Aug 16, 2023 at 02:37:16PM +0200, Peter Zijlstra wrote:
> > > > On Mon, Aug 14, 2023 at 08:32:55PM +0200, Mike Galbraith wrote:

[snip...]

> Reducing the spinlock contention could help improve the situation.
> Feng Tang told me that there is a discussion on the LKML related to high
> slub spinlock contention[2]. And Feng provides a hack patch which

The discussion is at
https://lore.kernel.org/all/ZL+R5kJpnHMUgGY2@feng-clx/

thanks,
Chenyu