linux-kernel - [PATCH 0/3] sched: Expose sd_llc_shared->has_idle

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Message-ID: <20251021145706.61534-1-arighi@nvidia.com>
Date: Tue, 21 Oct 2025 16:55:41 +0200
From: Andrea Righi <arighi@...dia.com>
To: Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>,
	Mel Gorman <mgorman@...e.de>,
	Valentin Schneider <vschneid@...hat.com>,
	Tejun Heo <tj@...nel.org>,
	David Vernet <void@...ifault.com>,
	Changwoo Min <changwoo@...lia.com>,
	Joel Fernandes <joelagnelf@...dia.com>,
	sched-ext@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] sched: Expose sd_llc_shared->has_idle_cores other sched classes

This patchset relocates code to make sd_llc_shared->has_idle_cores
available to other scheduling classes and updates the sched_ext built-in
idle CPU selection policy to make use of it.

Andrea Righi (3):
      sched: Relocate sched_smt_present definition to core.c
      sched: Expose sd_llc_shared->has_idle_cores to other sched classes
      sched_ext: idle: Reuse sd_llc_shared->has_idle_cores

 kernel/sched/core.c     |  5 ++++
 kernel/sched/ext_idle.c |  9 ++++++-
 kernel/sched/fair.c     | 66 +------------------------------------------------
 kernel/sched/idle.c     | 31 +++++++++++++++++++++++
 kernel/sched/sched.h    | 55 +++++++++++++++++++++++++++++++----------
 5 files changed, 87 insertions(+), 79 deletions(-)