linux-kernel - Re: [PATCH 2/2] sched/deadline: Correctly account for allocated bandwidth during hotplug

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: <ZzTWkZJktDMlwQEW@jlelli-thinkpadt14gen4.remote.csb>
Date: Wed, 13 Nov 2024 16:40:49 +0000
From: Juri Lelli <juri.lelli@...hat.com>
To: Waiman Long <llong@...hat.com>
Cc: Tejun Heo <tj@...nel.org>, Johannes Weiner <hannes@...xchg.org>,
	Michal Koutny <mkoutny@...e.com>, Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
	Valentin Schneider <vschneid@...hat.com>,
	Qais Yousef <qyousef@...alina.io>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	"Joel Fernandes (Google)" <joel@...lfernandes.org>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Aashish Sharma <shraash@...gle.com>,
	Shin Kawamura <kawasin@...gle.com>,
	Vineeth Remanan Pillai <vineeth@...byteword.org>,
	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org
Subject: Re: [PATCH 2/2] sched/deadline: Correctly account for allocated
 bandwidth during hotplug

On 13/11/24 11:06, Waiman Long wrote:

...

> This part can still cause a failure in one of test cases in my cpuset
> partition test script. In this particular case, the CPU to be offlined is an
> isolated CPU with scheduling disabled. As a result, total_bw is 0 and the
> __dl_overflow() test failed. Is there a way to skip the __dl_overflow() test
> for isolated CPUs? Can we use a null total_bw as a proxy for that?

Can you please share the repro script? Would like to check locally what
is going on.

Thanks!
Juri