[PATCH v5 0/2] sched: Enable preferred SMT siblings on NVIDIA Olympus

[Peter Zijlstra]

On Wed, Sep 09, 2026 at 04:36:01PM +0100, Will Deacon wrote:
> On Wed, Sep 09, 2026 at 03:14:15PM +0200, Peter Zijlstra wrote:
> > On Wed, Sep 09, 2026 at 08:26:07AM +0200, Andrea Righi wrote:
> > 
> > > Andrea Righi (2):
> > >       arm64: topology: Prefer PE0 on NVIDIA Olympus SMT cores
> > >       sched/fair: Honor asymmetric SMT priority in idle selection
> > > 
> > >  arch/arm64/include/asm/topology.h |  1 +
> > >  arch/arm64/kernel/smp.c           |  1 +
> > >  arch/arm64/kernel/topology.c      | 51 +++++++++++++++++++++++
> > >  kernel/sched/fair.c               | 85 +++++++++++++++++++++++++++++++--------
> > >  kernel/sched/sched.h              |  6 +++
> > >  kernel/sched/topology.c           | 36 +++++++++++++++++
> > >  6 files changed, 163 insertions(+), 17 deletions(-)
> > 
> > I tentatively picked these up, but I need an arm64 ack before I can
> > merge them, and ideally vingu will bless them too :-)
> 
> We've had five versions of this in five minutes, but the arch code is
> pretty filthy tbh. Detecting topology based on MIDR is a non-starter,
> sorry.

Yeah, Andrea is a wee bit fast with re-posting. I'll drop this, no
worries.