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Groups > linux.debian.kernel > #94661

Re: Re-designating cloud kernel

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On Wed, Oct 28, 2026 at 11:53:46AM -0700, Ross Vandegrift wrote:
> > For the record, I don't love the idea of eliminating the second kernel
> > build.  While we haven't taken advantage of this opportunity to this
> > point, it allows us to provide build-time optimizations to best tune
> > performance for specific deployment scenarios.  But I suppose runtime
> > tuning is sufficient for most people, as we haven't received any
> > requests for different build-time optimizations afaik.  So I don't
> > object too strongly to the plan, and I understand that it offers some
> > advantages.
> 
> Are there specific optimizations you have in mind that would become
> impossible?

CONFIG_HZ_* is an example that comes to mind.  Changing that for the
cloud kernels was requested several years ago (see #941284) and we
decіded not to do it, so I'm just mentioning that as a specific example,
not a proposal.  There are likely other such compile-time tunables that
might be worth considering.

noah

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Thread

Re-designating cloud kernel Bastian Blank <waldi@debian.org> - 2026-10-28 15:10 +0100
  Re: Re-designating cloud kernel Noah Meyerhans <noahm@debian.org> - 2026-10-28 15:50 +0100
    Re: Re-designating cloud kernel Noah Meyerhans <noahm@debian.org> - 2026-10-28 20:30 +0100
    Re: Re-designating cloud kernel Ross Vandegrift <rvandegrift@debian.org> - 2026-10-28 21:00 +0100
    Re: Re-designating cloud kernel Bastian Blank <waldi@debian.org> - 2026-10-30 13:10 +0100
      Re: Re-designating cloud kernel Noah Meyerhans <noahm@debian.org> - 2026-10-30 16:20 +0100

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