linux-kernel - [PATCH] arm64: Demote boot and shutdown messages to pr

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Date:   Tue, 30 Apr 2019 15:38:31 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     rmk+kernel@...linux.org.uk,
        Florian Fainelli <f.fainelli@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Marc Zyngier <marc.zyngier@....com>,
        Julien Thierry <julien.thierry@....com>,
        Suzuki K Poulose <Suzuki.Poulose@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        Rob Herring <robh@...nel.org>,
        Steve Capper <steve.capper@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] arm64: Demote boot and shutdown messages to pr_debug

Similar to commits c68b0274fb3cf ("ARM: reduce "Booted secondary
processor" message to debug level") and 035e787543de7 ("ARM: 8644/1: Reduce "CPU:
shutdown" message to debug level"), demote the secondary_start_kernel()
and __cpu_die() messages from info, respectively notice to debug. While
we are at it, also do this for cpu_psci_cpu_kill() which is redundant
with __cpu_die().

This helps improve the amount of possible hotplug cycles by around +50%
on ARCH_BRCMSTB.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 arch/arm64/kernel/psci.c | 2 +-
 arch/arm64/kernel/smp.c  | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/kernel/psci.c b/arch/arm64/kernel/psci.c
index 8cdaf25e99cd..a78581046c80 100644
--- a/arch/arm64/kernel/psci.c
+++ b/arch/arm64/kernel/psci.c
@@ -96,7 +96,7 @@ static int cpu_psci_cpu_kill(unsigned int cpu)
 	for (i = 0; i < 10; i++) {
 		err = psci_ops.affinity_info(cpu_logical_map(cpu), 0);
 		if (err == PSCI_0_2_AFFINITY_LEVEL_OFF) {
-			pr_info("CPU%d killed.\n", cpu);
+			pr_debug("CPU%d killed.\n", cpu);
 			return 0;
 		}
 
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 824de7038967..71fd2b5a3f0e 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -259,7 +259,7 @@ asmlinkage notrace void secondary_start_kernel(void)
 	 * the CPU migration code to notice that the CPU is online
 	 * before we continue.
 	 */
-	pr_info("CPU%u: Booted secondary processor 0x%010lx [0x%08x]\n",
+	pr_debug("CPU%u: Booted secondary processor 0x%010lx [0x%08x]\n",
 					 cpu, (unsigned long)mpidr,
 					 read_cpuid_id());
 	update_cpu_boot_status(CPU_BOOT_SUCCESS);
@@ -348,7 +348,7 @@ void __cpu_die(unsigned int cpu)
 		pr_crit("CPU%u: cpu didn't die\n", cpu);
 		return;
 	}
-	pr_notice("CPU%u: shutdown\n", cpu);
+	pr_debug("CPU%u: shutdown\n", cpu);
 
 	/*
 	 * Now that the dying CPU is beyond the point of no return w.r.t.
-- 
2.17.1