Re: [PATCH v3 0/4] preempt: PREEMPT vs PREEMPT_DYNAMIC configs fixup

From: Frederic Weisbecker
Date: Mon Mar 14 2022 - 18:42:41 EST


On Fri, Nov 12, 2021 at 06:51:59PM +0000, Valentin Schneider wrote:
> Hi folks,
>
> This v3 is mostly about the naming problem - get your paintbrushes ready!
>
> Patches
> =======
>
> o Patch 1 is the meat of the topic - note that it's now in tip/sched/urgent
> o Patch 2 introduces helpers for the dynamic preempt state
> o Patches 3-4 make use of said accessors where relevant.
>
> Testing
> =======
>
> Briefly tested the dynamic part on an x86 kernel + QEMU.
> Compile-tested the kcsan test thingie as a module.
>
> Revisions
> =========
>
> v1: http://lore.kernel.org/r/20211105104035.3112162-1-valentin.schneider@xxxxxxx
> v1.5: http://lore.kernel.org/r/20211109151057.3489223-1-valentin.schneider@xxxxxxx
>
> v2 -> v3
> ++++++++
>
> o Turned is_preempt_*() into preempt_model_*() (Frederic)
> It breaks my rule of "booleans must answer a yes/no question" but is the best
> I could come with using a "preempt_" prefix
>
> o Added preempt_model_preemptible() (Marco)
> Now used in kcsan_test.c
>
> o Dropped powerpc changes
>
> Cheers,
> Valentin
>
>
> Valentin Schneider (4):
> preempt: Restore preemption model selection configs

Seems like this one has been applied from the previous series.

> preempt/dynamic: Introduce preemption model accessors
> kcsan: Use preemption model accessors
> ftrace: Use preemption model accessors for trace header printout

So for the rest:

Acked-by: Frederic Weisbecker <frederic@xxxxxxxxxx>

Thanks!