From: Yury Norov <yury.norov@gmail.com>
To: linux-kernel@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Anna-Maria Behnsen <anna-maria@linutronix.de>,
Ben Segall <bsegall@google.com>,
Daniel Bristot de Oliveira <bristot@redhat.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Frederic Weisbecker <frederic@kernel.org>,
Imran Khan <imran.f.khan@oracle.com>,
Ingo Molnar <mingo@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Juri Lelli <juri.lelli@redhat.com>,
Leonardo Bras <leobras@redhat.com>, Mel Gorman <mgorman@suse.de>,
Peter Zijlstra <peterz@infradead.org>,
Rik van Riel <riel@surriel.com>,
Steven Rostedt <rostedt@goodmis.org>, Tejun Heo <tj@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Valentin Schneider <vschneid@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Waiman Long <longman@redhat.com>,
Yury Norov <yury.norov@gmail.com>,
Zefan Li <lizefan.x@bytedance.com>,
cgroups@vger.kernel.org
Subject: [PATCH 0/6] bitmap: optimize API usage
Date: Mon, 13 May 2024 15:01:40 -0700 [thread overview]
Message-ID: <20240513220146.1461457-1-yury.norov@gmail.com> (raw)
In a few places bitmap API is called with such a combination of
parameters that makes the call unneeded, or there's a trivial cheaper
alternative.
For example, cpumask_copy(dst, src) where dst == src is simply a no-op.
This series addresses such cases spotted on x86_64 with LTP.
All the patches are independent and may be applied separately in
corresponding subsystems. Or I can take them in bitmap branch, if it's
more convenient.
Yury Norov (6):
smp: optimize smp_call_function_many_cond()
sched/topology: optimize topology_span_sane()
driver core: cpu: optimize print_cpus_isolated()
genirq: optimze irq_do_set_affinity()
cgroup/cpuset: optimize cpuset_mems_allowed_intersects()
tick/common: optimize cpumask_equal() usage
drivers/base/cpu.c | 6 ++++--
kernel/cgroup/cpuset.c | 3 +++
kernel/irq/manage.c | 3 ++-
kernel/sched/topology.c | 2 +-
kernel/smp.c | 5 ++++-
kernel/time/tick-common.c | 15 +++++++++++----
6 files changed, 25 insertions(+), 9 deletions(-)
--
2.40.1
next reply other threads:[~2024-05-13 22:01 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-13 22:01 Yury Norov [this message]
2024-05-13 22:01 ` [PATCH 1/6] smp: optimize smp_call_function_many_cond() Yury Norov
2024-05-13 22:01 ` [PATCH 2/6] sched/topology: optimize topology_span_sane() Yury Norov
2024-05-14 20:53 ` Christophe JAILLET
2024-05-13 22:01 ` [PATCH 3/6] driver core: cpu: optimize print_cpus_isolated() Yury Norov
2024-05-14 21:02 ` Thomas Gleixner
2024-05-13 22:01 ` [PATCH 4/6] genirq: optimize irq_do_set_affinity() Yury Norov
2024-05-14 12:51 ` Jinjie Ruan
2024-05-14 16:16 ` Yury Norov
2024-05-13 22:01 ` [PATCH 5/6] cgroup/cpuset: optimize cpuset_mems_allowed_intersects() Yury Norov
2024-05-14 16:47 ` Waiman Long
2024-05-14 16:50 ` Tejun Heo
2024-05-14 16:55 ` Waiman Long
2024-05-13 22:01 ` [PATCH 6/6] tick/common: optimize cpumask_equal() usage Yury Norov
2024-05-14 8:31 ` Thomas Gleixner
2024-05-14 8:42 ` Thomas Gleixner
2024-05-14 16:47 ` Yury Norov
2024-05-14 20:47 ` Thomas Gleixner
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