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Message-ID: <20200529160556.bessfi6wblvl572d@e107158-lin>
Date: Fri, 29 May 2020 17:05:57 +0100
From: Qais Yousef <qais.yousef@....com>
To: Mel Gorman <mgorman@...e.de>
Cc: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Randy Dunlap <rdunlap@...radead.org>,
Jonathan Corbet <corbet@....net>,
Juri Lelli <juri.lelli@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Steven Rostedt <rostedt@...dmis.org>,
Ben Segall <bsegall@...gle.com>,
Luis Chamberlain <mcgrof@...nel.org>,
Kees Cook <keescook@...omium.org>,
Iurii Zaikin <yzaikin@...gle.com>,
Quentin Perret <qperret@...gle.com>,
Valentin Schneider <valentin.schneider@....com>,
Patrick Bellasi <patrick.bellasi@...bug.net>,
Pavan Kondeti <pkondeti@...eaurora.org>,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 1/2] sched/uclamp: Add a new sysctl to control RT default
boost value
On 05/29/20 17:02, Mel Gorman wrote:
> On Fri, May 29, 2020 at 04:11:18PM +0100, Qais Yousef wrote:
> > > Elsewhere in the thread, I showed some results based on 5.7 so uclamp
> > > task group existed but I had it disabled. The uclamp related parts of
> > > the kconfig were
> > >
> > > # zgrep UCLAMP kconfig-5.7.0-rc7-with-clamp.txt.gz
> > > CONFIG_UCLAMP_TASK=y
> > > CONFIG_UCLAMP_BUCKETS_COUNT=5
> > > # CONFIG_UCLAMP_TASK_GROUP is not set
> >
> > So you never had the TASK_GROUP part enabled when you noticed the regression?
>
> Correct.
>
> > Or is it the other way around, you just disabled CONFIG_UCLAMP_TASK_GROUP to
> > 'fix' it?
> >
>
> I disabled CONFIG_UCLAMP_TASK to "fix" it.
Okay. That eliminates one thing out at least.
Thanks
--
Qais Yousef
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