linux-kernel - [PATCH v7 0/8] sched/fair: Get rid of sched_domains_curr

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250826041319.1284-1-kprateek.nayak@amd.com>
Date: Tue, 26 Aug 2025 04:13:11 +0000
From: K Prateek Nayak <kprateek.nayak@....com>
To: Madhavan Srinivasan <maddy@...ux.ibm.com>, Michael Ellerman
	<mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>, Christophe Leroy
	<christophe.leroy@...roup.eu>, Heiko Carstens <hca@...ux.ibm.com>, "Vasily
 Gorbik" <gor@...ux.ibm.com>, Alexander Gordeev <agordeev@...ux.ibm.com>,
	Christian Borntraeger <borntraeger@...ux.ibm.com>, Sven Schnelle
	<svens@...ux.ibm.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar
	<mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen
	<dave.hansen@...ux.intel.com>, <x86@...nel.org>, "H. Peter Anvin"
	<hpa@...or.com>, Peter Zijlstra <peterz@...radead.org>, Juri Lelli
	<juri.lelli@...hat.com>, Vincent Guittot <vincent.guittot@...aro.org>,
	<linuxppc-dev@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>,
	<linux-s390@...r.kernel.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>, K Prateek Nayak
	<kprateek.nayak@....com>, <thomas.weissschuh@...utronix.de>, Li Chen
	<chenl311@...natelecom.cn>, Bibo Mao <maobibo@...ngson.cn>, Mete Durlu
	<meted@...ux.ibm.com>, Tobias Huschle <huschle@...ux.ibm.com>, "Easwar
 Hariharan" <easwar.hariharan@...ux.microsoft.com>, Guo Weikang
	<guoweikang.kernel@...il.com>, "Rafael J. Wysocki"
	<rafael.j.wysocki@...el.com>, Brian Gerst <brgerst@...il.com>, Patryk Wlazlyn
	<patryk.wlazlyn@...ux.intel.com>, Swapnil Sapkal <swapnil.sapkal@....com>,
	"Yury Norov [NVIDIA]" <yury.norov@...il.com>, Sudeep Holla
	<sudeep.holla@....com>, Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Andrea Righi <arighi@...dia.com>, Yicong Yang <yangyicong@...ilicon.com>,
	Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>, Tim Chen
	<tim.c.chen@...ux.intel.com>, Vinicius Costa Gomes <vinicius.gomes@...el.com>
Subject: [PATCH v7 0/8] sched/fair: Get rid of sched_domains_curr_level hack for tl->cpumask()

This version uses Peter's suggestion from [1] as if and incrementally
adds cleanup on top to the arch/ bits. I've tested the x86 side but the
PowerPC and the s390 bits are only build tested. Review and feedback is
greatly appreciated.

[1] https://lore.kernel.org/lkml/20250825091910.GT3245006@noisy.programming.kicks-ass.net/

Patches are prepared on top of tip:master at commit 4628e5bbca91 ("Merge
branch into tip/master: 'x86/tdx'")
---
changelog v6..v7:

o Fix the s390 and ppc build errors (Intel test robot)

o Use Peter's diff as is and incrementally do the cleanup on top. The
  PowerPC part was slightly more extensive due to the lack of
  CONFIG_SCHED_MC in arch/powerpc/Kconfig.

v6: https://lore.kernel.org/lkml/20250825120244.11093-1-kprateek.nayak@amd.com/
---
K Prateek Nayak (7):
  powerpc/smp: Rename cpu_corgroup_* to cpu_corgrp_*
  powerpc/smp: Export cpu_coregroup_mask()
  powerpc/smp: Introduce CONFIG_SCHED_MC to guard MC scheduling bits
  sched/topology: Unify tl_smt_mask() across core and all arch
  sched/topology: Unify tl_cls_mask() across core and x86
  sched/topology: Unify tl_mc_mask() across core and all arch
  sched/topology: Unify tl_pkg_mask() across core and all arch

Peter Zijlstra (1):
  sched/fair: Get rid of sched_domains_curr_level hack for tl->cpumask()

 arch/powerpc/Kconfig           |  9 ++++++
 arch/powerpc/include/asm/smp.h |  4 +++
 arch/powerpc/kernel/smp.c      | 51 +++++++++++++++++++---------------
 arch/s390/kernel/topology.c    | 16 ++++-------
 arch/x86/kernel/smpboot.c      |  9 +++---
 include/linux/sched/topology.h | 34 ++++++++++++++++++++---
 include/linux/topology.h       |  2 +-
 kernel/sched/topology.c        | 28 +++++++------------
 8 files changed, 93 insertions(+), 60 deletions(-)


base-commit: 4628e5bbca916edaf4ed55915ab399f9ba25519f
-- 
2.34.1