On 1/6/25 10:49, Shrikanth Hegde wrote:
Now that preempt=lazy patches[1] are in powerpc-next tree, sending out the
patch to support dynamic preemption based on DYNAMIC_KEY.
base: powerpc-next
+ankur, sebastian; sorry for not cc'ing earlier.
Once the arch supports static inline calls, it would be needed to
evaluate to see if that gives better performance.
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)
v1: https://lore.kernel.org/all/20241125042212.1522315-1-sshe...@linux.ibm.com/
v2: https://lore.kernel.org/all/20250102191856.499424-1-sshe...@linux.ibm.com/
[1]:
https://lore.kernel.org/all/173572211264.1875638.9927288574435880962.b4...@linux.ibm.com/
Shrikanth Hegde (1):
powerpc: Enable dynamic preemption
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/preempt.h | 12 ++++++++++++
arch/powerpc/kernel/interrupt.c | 6 +++++-
arch/powerpc/kernel/traps.c | 6 +++++-
arch/powerpc/lib/vmx-helper.c | 2 +-
5 files changed, 24 insertions(+), 3 deletions(-)
create mode 100644 arch/powerpc/include/asm/preempt.h
Hi maddy, mpe, christophe.
Now that preempt=lazy is merged upstream, is would be start to enable
dynamic preemption to make use of all preemption models at runtime.
Are there any concerns with this patch?
Thanks.
