From: Yury Norov <yury.norov@gmail.com>
To: "Paul E. McKenney" <paulmck@kernel.org>,
Neeraj Upadhyay <neeraj.upadhyay@kernel.org>,
"Yury Norov [NVIDIA]" <yury.norov@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Thorsten Blum <thorsten.blum@linux.dev>,
Zqiang <qiang.zhang1211@gmail.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 3/4] smp: Don't wait for remote work done if not needed in smp_call_function_many_cond()
Date: Sun, 22 Jun 2025 20:00:08 -0400 [thread overview]
Message-ID: <20250623000010.10124-4-yury.norov@gmail.com> (raw)
In-Reply-To: <20250623000010.10124-1-yury.norov@gmail.com>
From: "Yury Norov [NVIDIA]" <yury.norov@gmail.com>
If we don't actually send any IPIs, there's no need to wait for a job
completion.
Signed-off-by: Yury Norov [NVIDIA] <yury.norov@gmail.com>
---
kernel/smp.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/smp.c b/kernel/smp.c
index 5871acf3cd45..715190669e94 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -849,6 +849,8 @@ static void smp_call_function_many_cond(const struct cpumask *mask,
send_call_function_single_ipi(last_cpu);
else if (likely(nr_cpus > 1))
send_call_function_ipi_mask(cfd->cpumask_ipi);
+ else
+ run_remote = false;
}
if (run_local) {
--
2.43.0
next prev parent reply other threads:[~2025-06-23 0:00 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-23 0:00 [PATCH v2 0/4] smp: Improve on cpumasks handling Yury Norov
2025-06-23 0:00 ` [PATCH v2 1/4] smp: Improve locality in smp_call_function_any() Yury Norov
2025-06-26 21:55 ` [tip: smp/core] " tip-bot2 for Yury Norov [NVIDIA]
2025-06-23 0:00 ` [PATCH v2 2/4] smp: Use cpumask_any_but() in smp_call_function_many_cond() Yury Norov
2025-06-26 21:55 ` [tip: smp/core] " tip-bot2 for Yury Norov [NVIDIA]
2025-06-23 0:00 ` Yury Norov [this message]
2025-06-26 21:55 ` [tip: smp/core] smp: Don't wait for remote work done if not needed " tip-bot2 for Yury Norov [NVIDIA]
2025-06-23 0:00 ` [PATCH v2 4/4] smp: Defer check for local execution " Yury Norov
2025-06-26 21:55 ` [tip: smp/core] " tip-bot2 for Yury Norov [NVIDIA]
2025-07-02 17:23 ` tip-bot2 for Yury Norov [NVIDIA]
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