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Re: Request to backport CONFIG_UCLAMP_TASK to 6.12 stable

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On Wed, 2025-07-16 at 13:25 -0700, William McVicker wrote:
> On 07/16/2025, Salvatore Bonaccorso wrote:
> > Hi,
> > 
> > On Thu, Jul 10, 2025 at 09:39:28AM -0700, William McVicker wrote:
> > > Hi,
> > > 
> > > Recently utilization clamping was enabled in the 6.15 experimental kernel via
> > > the options UCLAMP_TASK and UCLAMP_TASK_GROUP [1] per the request in [2]. I'd
> > > like to request for this change to backported to the ARM64 6.12 stable kernel
> > > to allow us to use this feature with a stable kernel for better performance
> > > management of VMs on arm64 servers.
> > > 
> > > Please let me know if there are any concerns or additional steps I need to
> > > take.
> > 
> > This is a new feature, and at this point of the release preparation
> > for trixie it won't be accepted anymore as it is not adding hardware
> > support. 
> > 
> > That means you likely will need to use later a bpo version for trixie.
> 
> Thanks for the response! Yes, I'm fine with using a bpo kernel version.
> Currently we are using the kernel version 6.12.32-1~bpo12+1. Is it possible to
> backport the change to the bookworm bpo kernel?

As this change was requested too late for trixie, it is not suitable for
bookworm-backports.  In general, <release-N>-backports can only be used
for backports from <release-N+1>.

There *are* also <release-N>-backports-sloppy suites which can contain
backports from <release-N+2>, but I have never uploaded kernel packages
to those and I don't plan to start.

Ben.

-- 
Ben Hutchings
The two most common things in the universe are hydrogen and stupidity.

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Thread

Request to backport CONFIG_UCLAMP_TASK to 6.12 stable William McVicker <willmcvicker@google.com> - 2025-07-10 19:00 +0200
  Re: Request to backport CONFIG_UCLAMP_TASK to 6.12 stable Salvatore Bonaccorso <carnil@debian.org> - 2025-07-16 08:20 +0200
    Re: Request to backport CONFIG_UCLAMP_TASK to 6.12 stable William McVicker <willmcvicker@google.com> - 2025-07-16 22:50 +0200
      Re: Request to backport CONFIG_UCLAMP_TASK to 6.12 stable Ben Hutchings <ben@decadent.org.uk> - 2025-07-17 16:40 +0200
        Re: Request to backport CONFIG_UCLAMP_TASK to 6.12 stable William McVicker <willmcvicker@google.com> - 2025-07-17 19:50 +0200
          Re: Request to backport CONFIG_UCLAMP_TASK to 6.12 stable Salvatore Bonaccorso <carnil@debian.org> - 2025-07-17 23:40 +0200
            Re: Request to backport CONFIG_UCLAMP_TASK to 6.12 stable William McVicker <willmcvicker@google.com> - 2025-07-18 00:20 +0200

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