From: "tip-bot2 for Yury Norov" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Yury Norov <yury.norov@gmail.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: sched/core] sched: replace cpumask_weight with cpumask_empty where appropriate
Date: Thu, 17 Feb 2022 18:56:54 -0000 [thread overview]
Message-ID: <164512421465.16921.1322444581830816438.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20220210224933.379149-23-yury.norov@gmail.com>
The following commit has been merged into the sched/core branch of tip:
Commit-ID: 1087ad4e3f88c474b8134a482720782922bf3fdf
Gitweb: https://git.kernel.org/tip/1087ad4e3f88c474b8134a482720782922bf3fdf
Author: Yury Norov <yury.norov@gmail.com>
AuthorDate: Thu, 10 Feb 2022 14:49:06 -08:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Wed, 16 Feb 2022 15:57:53 +01:00
sched: replace cpumask_weight with cpumask_empty where appropriate
In some places, kernel/sched code calls cpumask_weight() to check if
any bit of a given cpumask is set. We can do it more efficiently with
cpumask_empty() because cpumask_empty() stops traversing the cpumask as
soon as it finds first set bit, while cpumask_weight() counts all bits
unconditionally.
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220210224933.379149-23-yury.norov@gmail.com
---
kernel/sched/core.c | 2 +-
kernel/sched/topology.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 1d863d7..c620aab 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -8708,7 +8708,7 @@ int cpuset_cpumask_can_shrink(const struct cpumask *cur,
{
int ret = 1;
- if (!cpumask_weight(cur))
+ if (cpumask_empty(cur))
return ret;
ret = dl_cpuset_cpumask_can_shrink(cur, trial);
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index e6cd559..1c84b48 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -74,7 +74,7 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
break;
}
- if (!cpumask_weight(sched_group_span(group))) {
+ if (cpumask_empty(sched_group_span(group))) {
printk(KERN_CONT "\n");
printk(KERN_ERR "ERROR: empty group\n");
break;
next prev parent reply other threads:[~2022-02-17 18:57 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-10 22:48 [PATCH v4 00/49] bitmap: optimize bitmap_weight() usage Yury Norov
2022-02-10 22:48 ` [PATCH 01/49] net: dsa: don't use bitmap_weight() in b53_arl_read() Yury Norov
2022-02-10 22:48 ` [PATCH 02/49] net: systemport: don't use bitmap_weight() in bcm_sysport_rule_set() Yury Norov
2022-02-10 22:48 ` [PATCH 03/49] net: mellanox: fix open-coded for_each_set_bit() Yury Norov
2022-02-11 9:01 ` David Laight
2022-02-10 22:48 ` [PATCH 04/49] iio: fix opencoded for_each_set_bit() Yury Norov
2022-02-11 8:45 ` Andy Shevchenko
2022-02-11 17:17 ` Christophe JAILLET
2022-06-04 15:41 ` Jonathan Cameron
2022-06-11 13:50 ` Jonathan Cameron
2022-02-10 22:48 ` [RFC PATCH 05/49] qed: rework qed_rdma_bmap_free() Yury Norov
2022-02-11 8:48 ` Andy Shevchenko
2022-02-10 22:48 ` [PATCH 06/49] nds32: perf: replace bitmap_weight with bitmap_empty where appropriate Yury Norov
2022-02-10 22:48 ` [PATCH 07/49] KVM: x86: " Yury Norov
2022-02-11 16:34 ` Sean Christopherson
2022-02-11 17:13 ` Christophe JAILLET
2022-02-11 17:19 ` Sean Christopherson
2022-02-11 17:47 ` Yury Norov
2022-02-10 22:48 ` [PATCH 08/49] drm: " Yury Norov
2022-02-11 2:11 ` Dmitry Baryshkov
2022-02-10 22:48 ` [PATCH 09/49] ice: replace bitmap_weight with bitmap_empty Yury Norov
2022-02-10 22:48 ` [PATCH 10/49] octeontx2-pf: replace bitmap_weight with bitmap_empty where appropriate Yury Norov
2022-02-10 22:48 ` [PATCH 11/49] qed: replace bitmap_weight with bitmap_empty in qed_roce_stop() Yury Norov
2022-02-10 22:48 ` [PATCH 12/49] perf: replace bitmap_weight with bitmap_empty where appropriate Yury Norov
2022-02-11 10:25 ` Mark Rutland
2022-02-11 17:59 ` Yury Norov
2022-02-11 17:27 ` Christophe JAILLET
2022-02-11 23:23 ` Yury Norov
2022-02-10 22:48 ` [PATCH 13/49] perf tools: " Yury Norov
2022-02-10 22:48 ` [PATCH 14/49] arch/alpha: replace cpumask_weight with cpumask_empty " Yury Norov
2022-02-10 22:48 ` [PATCH 15/49] arch/ia64: " Yury Norov
2022-02-10 22:49 ` [PATCH 16/49] arch/x86: " Yury Norov
2022-04-10 20:42 ` [tip: x86/cleanups] x86: Replace cpumask_weight() with cpumask_empty() " tip-bot2 for Yury Norov
2022-02-10 22:49 ` [PATCH 17/49] cpufreq: replace cpumask_weight with cpumask_empty " Yury Norov
2022-02-11 4:30 ` Viresh Kumar
2022-02-11 5:17 ` Yury Norov
2022-02-10 22:49 ` [PATCH 18/49] drm/i915/pmu: " Yury Norov
2022-02-10 22:49 ` [PATCH 19/49] RDMA/hfi: " Yury Norov
2022-02-11 19:10 ` Jason Gunthorpe
2022-02-10 22:49 ` [PATCH 20/49] irq: mips: " Yury Norov
2022-04-10 20:34 ` [tip: irq/core] irqchip/bmips: Replace cpumask_weight() with cpumask_empty() tip-bot2 for Yury Norov
2022-02-10 22:49 ` [PATCH 21/49] genirq/affinity: replace cpumask_weight with cpumask_empty where appropriate Yury Norov
2022-04-10 20:27 ` [tip: irq/core] genirq/affinity: Replace cpumask_weight() with cpumask_empty() " tip-bot2 for Yury Norov
[not found] ` <573841649622719@mail.yandex.com>
2022-04-10 21:17 ` Yury Norov
2022-02-10 22:49 ` [PATCH 22/49] sched: replace cpumask_weight with cpumask_empty " Yury Norov
2022-02-11 10:19 ` Peter Zijlstra
2022-02-11 14:19 ` Yury Norov
2022-02-17 18:56 ` tip-bot2 for Yury Norov [this message]
2022-02-10 22:49 ` [PATCH 23/49] clocksource: replace cpumask_weight with cpumask_empty in clocksource.c Yury Norov
2022-04-10 20:35 ` [tip: timers/core] clocksource: Replace cpumask_weight() with cpumask_empty() tip-bot2 for Yury Norov
2022-02-10 22:49 ` [PATCH 24/49] mm/vmstat: replace cpumask_weight with cpumask_empty where appropriate Yury Norov
2022-02-11 10:39 ` Mike Rapoport
2022-02-10 22:49 ` [PATCH 25/49] arch/x86: replace nodes_weight with nodes_empty " Yury Norov
2022-04-10 20:42 ` [tip: x86/cleanups] x86/mm: Replace nodes_weight() with nodes_empty() " tip-bot2 for Yury Norov
2022-02-10 22:49 ` [PATCH 26/49] bitmap: add bitmap_weight_{cmp, eq, gt, ge, lt, le} functions Yury Norov
2022-02-10 22:49 ` [PATCH 27/49] arch/x86: replace bitmap_weight with bitmap_weight_{eq,gt,ge,lt,le} where appropriate Yury Norov
2022-02-10 22:49 ` [PATCH 28/49] iio: replace bitmap_weight() with bitmap_weight_{eq,gt} " Yury Norov
2022-02-10 22:49 ` [PATCH 29/49] memstick: replace bitmap_weight with bitmap_weight_eq " Yury Norov
2022-02-17 15:39 ` Ulf Hansson
2022-02-17 16:55 ` Yury Norov
2022-02-22 15:49 ` Ulf Hansson
2022-02-10 22:49 ` [PATCH 30/49] ixgbe: replace bitmap_weight with bitmap_weight_eq Yury Norov
2022-02-10 22:49 ` [PATCH 31/49] octeontx2-pf: replace bitmap_weight with bitmap_weight_{eq,gt} Yury Norov
2022-02-10 22:49 ` [PATCH 32/49] mlx4: replace bitmap_weight with bitmap_weight_{eq,gt,ge,lt,le} Yury Norov
2022-02-10 22:49 ` [PATCH 33/49] perf: replace bitmap_weight with bitmap_weight_eq for ThunderX2 Yury Norov
2022-02-11 10:30 ` Mark Rutland
2022-02-10 22:49 ` [PATCH 34/49] media: tegra-video: replace bitmap_weight with bitmap_weight_le Yury Norov
2022-04-28 7:31 ` Hans Verkuil
2022-02-10 22:49 ` [PATCH 35/49] cpumask: add cpumask_weight_{eq,gt,ge,lt,le} Yury Norov
2022-02-10 22:49 ` [PATCH 36/49] arch/ia64: replace cpumask_weight with cpumask_weight_eq in mm/tlb.c Yury Norov
2022-02-10 22:49 ` [PATCH 37/49] arch/mips: replace cpumask_weight with cpumask_weight_{eq, ...} where appropriate Yury Norov
2022-02-10 22:49 ` [PATCH 38/49] arch/powerpc: " Yury Norov
2022-02-11 4:10 ` Michael Ellerman
2022-02-10 22:49 ` [PATCH 39/49] arch/s390: replace cpumask_weight with cpumask_weight_eq " Yury Norov
2022-02-11 6:54 ` Sven Schnelle
2022-02-11 23:40 ` Yury Norov
2022-02-10 22:49 ` [PATCH 40/49] firmware: pcsi: replace cpumask_weight with cpumask_weight_eq Yury Norov
2022-02-11 9:45 ` Sudeep Holla
2022-02-11 10:32 ` Mark Rutland
2022-02-10 22:49 ` [PATCH 41/49] RDMA/hfi1: replace cpumask_weight with cpumask_weight_{eq, ...} where appropriate Yury Norov
2022-02-11 19:11 ` Jason Gunthorpe
2022-02-10 22:49 ` [PATCH 42/49] scsi: lpfc: replace cpumask_weight with cpumask_weight_gt Yury Norov
2022-02-10 22:49 ` [PATCH 43/49] soc/qman: replace cpumask_weight with cpumask_weight_lt Yury Norov
2022-02-10 22:49 ` [PATCH 44/49] nodemask: add nodemask_weight_{eq,gt,ge,lt,le} Yury Norov
2022-02-10 22:49 ` [PATCH 45/49] ACPI: replace nodes__weight with nodes_weight_ge for numa Yury Norov
2022-02-14 19:18 ` Rafael J. Wysocki
2022-02-14 19:34 ` Yury Norov
2022-02-14 19:45 ` Rafael J. Wysocki
2022-02-14 19:55 ` Yury Norov
2022-02-10 22:49 ` [PATCH 46/49] mm/mempolicy: replace nodes_weight with nodes_weight_eq Yury Norov
2022-02-11 10:40 ` Mike Rapoport
2022-02-11 17:44 ` Christophe JAILLET
2022-02-11 19:47 ` Yury Norov
2022-02-10 22:49 ` [PATCH 47/49] nodemask: add num_node_state_eq() Yury Norov
2022-02-11 10:41 ` Mike Rapoport
2022-02-10 22:49 ` [PATCH 48/49] tools: bitmap: sync bitmap_weight Yury Norov
2022-02-10 22:49 ` [PATCH 49/49] MAINTAINERS: add cpumask and nodemask files to BITMAP_API Yury Norov
2022-02-15 23:18 ` [PATCH v4 00/49] bitmap: optimize bitmap_weight() usage Will Deacon
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