Now that preempt=lazy patches are merged upstream, sending out the patch to support dynamic preemption based on DYNAMIC_KEY.
Once the arch supports static inline calls, it would be needed to evaluate to see if that gives better performance. This makes the same code for arm64 and powerpc. Will be sending an RFC patch to move this static key into sched/core. v3->v4: - Use static key instead of using preempt_model_preemptible (Sebastian Andrzej Siewior and Christophe Leroy) - Dropped printing the preemption model, since it is addressed in a patchset from Sebastian Andrzej Siewior v2->v3: - fixed a build error reported by linux test robot by including jump label header. v1->v2: - Instead of copying asm-generic preempt.h content include it in arch/asm preempt.h. (Christophe Leroy) - Merge the patches into one patch (Christophe Leroy) v3: https://lore.kernel.org/all/20250106051919.55020-1-sshe...@linux.ibm.com/ Shrikanth Hegde (1): powerpc: enable dynamic preemption arch/powerpc/Kconfig | 1 + arch/powerpc/include/asm/preempt.h | 16 ++++++++++++++++ arch/powerpc/kernel/interrupt.c | 6 +++++- arch/powerpc/lib/vmx-helper.c | 2 +- 4 files changed, 23 insertions(+), 2 deletions(-) create mode 100644 arch/powerpc/include/asm/preempt.h -- 2.39.3
