Re: Enable CONFIG_UCLAMP_TASK by default in debian

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From	Qais Yousef <qyousef@layalina.io>
Newsgroups	linux.debian.kernel, linux.debian.bugs.dist
Subject	Re: Enable CONFIG_UCLAMP_TASK by default in debian
Date	Wed, 31 May 2023 20:20:01 +0200
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On 05/24/23 10:18, Salvatore Bonaccorso wrote:
> Package: src:linux
> Version: 6.1.27-1
> Severity: wishlist
> 
> Hi
> 
> On Sat, May 20, 2023 at 10:50:02PM +0100, Qais Yousef wrote:
> > Hi
> > 
> > Debian kernels don't ship with CONFIG_UCLAMP_TASK and CONFIG_UCLAMP_TASK_GROUP
> > configs enabled in the kernel, is there any reason for that?
> > 
> > These configs enable smarter performance management for tasks and it'd be good
> > to know if there's a reason preventing you from enabling it.
> > 
> > Some useful docs:
> > 
> > 	https://kernel.org/doc/html/latest/scheduler/sched-util-clamp.html?highlight=util+clamp
> > 	https://man7.org/linux/man-pages/man1/uclampset.1.html
> > 
> > Happy to contribute patches if that helps.
> 
> I cannot yet judge if it is sensible, as unkown which impact it
> otherwise has to enable those, but let's make a tracking bug for your
> request.

Sorry for the delayed response.

When uclamp is not used, it's protected with a static key in the kernel, so
should add no extra overhead when not used; if that's the concern you have.

Ubuntu ships with these configs enabled FWIW.

Thanks for creating the bug!

--
Qais Yousef

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Thread

Enable CONFIG_UCLAMP_TASK by default in debian Qais Yousef <qyousef@layalina.io> - 2023-05-21 00:10 +0200
  Re: Enable CONFIG_UCLAMP_TASK by default in debian Salvatore Bonaccorso <carnil@debian.org> - 2023-05-24 10:20 +0200
    Re: Enable CONFIG_UCLAMP_TASK by default in debian Qais Yousef <qyousef@layalina.io> - 2023-05-31 20:20 +0200

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