From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:60632 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752262AbdGSJRx (ORCPT ); Wed, 19 Jul 2017 05:17:53 -0400 Subject: Patch "sched/topology: Optimize build_group_mask()" has been added to the 4.9-stable tree To: lvenanci@redhat.com, efault@gmx.de, gregkh@linuxfoundation.org, mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de, torvalds@linux-foundation.org Cc: , From: Date: Wed, 19 Jul 2017 11:17:39 +0200 Message-ID: <150045585933121@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled sched/topology: Optimize build_group_mask() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: sched-topology-optimize-build_group_mask.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From f32d782e31bf079f600dcec126ed117b0577e85c Mon Sep 17 00:00:00 2001 From: Lauro Ramos Venancio Date: Thu, 20 Apr 2017 16:51:40 -0300 Subject: sched/topology: Optimize build_group_mask() From: Lauro Ramos Venancio commit f32d782e31bf079f600dcec126ed117b0577e85c upstream. The group mask is always used in intersection with the group CPUs. So, when building the group mask, we don't have to care about CPUs that are not part of the group. Signed-off-by: Lauro Ramos Venancio Signed-off-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: lwang@redhat.com Cc: riel@redhat.com Link: http://lkml.kernel.org/r/1492717903-5195-2-git-send-email-lvenanci@redhat.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- kernel/sched/core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6113,12 +6113,12 @@ enum s_alloc { */ static void build_group_mask(struct sched_domain *sd, struct sched_group *sg) { - const struct cpumask *span = sched_domain_span(sd); + const struct cpumask *sg_span = sched_group_cpus(sg); struct sd_data *sdd = sd->private; struct sched_domain *sibling; int i; - for_each_cpu(i, span) { + for_each_cpu(i, sg_span) { sibling = *per_cpu_ptr(sdd->sd, i); if (!cpumask_test_cpu(i, sched_domain_span(sibling))) continue; Patches currently in stable-queue which might be from lvenanci@redhat.com are queue-4.9/sched-topology-fix-building-of-overlapping-sched-groups.patch queue-4.9/sched-topology-fix-overlapping-sched_group_mask.patch queue-4.9/sched-fair-cpumask-export-for_each_cpu_wrap.patch queue-4.9/sched-topology-optimize-build_group_mask.patch