Re: Linux 6.13

On Mon, 20 Jan 2025 18:05:29 +0000, vallor wrote:

PREEMPT_DYNAMIC
>

You copied the wrong section:

config PREEMPT_DYNAMIC
bool "Preemption behaviour defined on boot"
depends on HAVE_PREEMPT_DYNAMIC
select JUMP_LABEL if HAVE_PREEMPT_DYNAMIC_KEY
select PREEMPT_BUILD
default y if HAVE_PREEMPT_DYNAMIC_CALL
help
  This option allows to define the preemption model on the kernel
  command line parameter and thus override the default preemption
  model defined during compile time.

***---->  The feature is primarily interesting for Linux distributions which
  provide a pre-built kernel binary to reduce the number of kernel
  flavors they offer while still offering different usecases.

  The runtime overhead is negligible with HAVE_STATIC_CALL_INLINE enabled
  but if runtime patching is not available for the specific architecture
  then the potential overhead should be considered.

  Interesting if you want the same pre-built kernel should be used for
  both Server and Desktop workloads.



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