Messages in this thread | | | From | Valentin Schneider <> | Subject | [PATCH v2 0/5] preempt: PREEMPT vs PREEMPT_DYNAMIC configs fixup | Date | Wed, 10 Nov 2021 20:24:43 +0000 |
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Hi folks,
Thanks to suggestions from Mike, Frederic and Marco I ended up with something that looks somewhat sane and with a minimal amount of crud.
Patches =======
o Patch 1 is the meat of the topic and could be picked on its own if the rest is too icky. o Patch 2 introduces helpers for the dynamic preempt state o Patches 3-5 make use of said accessors where relevant.
Testing =======
Briefly tested the dynamic part on an x86 kernel + QEMU. x86_64_defconfig gets me:
Dynamic Preempt: voluntary
and appending preempt=full gets me:
Dynamic Preempt: full
Revisions =========
v1: http://lore.kernel.org/r/20211105104035.3112162-1-valentin.schneider@arm.com v1.5: http://lore.kernel.org/r/20211109151057.3489223-1-valentin.schneider@arm.com
This v2 is completely different from v1, so I felt like I could get away without writing a version changelog...
Cheers, Valentin
Valentin Schneider (5): preempt: Restore preemption model selection configs preempt/dynamic: Introduce preempt mode accessors powerpc: Use preemption model accessors kscan: Use preemption model accessors ftrace: Use preemption model accessors for trace header printout
arch/powerpc/kernel/interrupt.c | 2 +- arch/powerpc/kernel/traps.c | 2 +- include/linux/kernel.h | 2 +- include/linux/sched.h | 16 +++++++++++++ include/linux/vermagic.h | 2 +- init/Makefile | 2 +- kernel/Kconfig.preempt | 42 ++++++++++++++++----------------- kernel/kcsan/kcsan_test.c | 4 ++-- kernel/sched/core.c | 17 ++++++++++--- kernel/trace/trace.c | 14 ++++------- 10 files changed, 62 insertions(+), 41 deletions(-)
-- 2.25.1
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