linux-kernel - [PATCH 1/2] genirq/cpuhotplug: Reduce logging level for couple of prints

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Message-Id: <1600906112-126722-1-git-send-email-psodagud@codeaurora.org>
Date:   Wed, 23 Sep 2020 17:08:31 -0700
From:   Prasad Sodagudi <psodagud@...eaurora.org>
To:     rostedt@...dmis.org, pmladek@...e.com,
        sergey.senozhatsky@...il.com, gregkh@...uxfoundation.org,
        tglx@...utronix.de
Cc:     linux-kernel@...r.kernel.org, tkjos@...gle.com,
        Prasad Sodagudi <psodagud@...eaurora.org>
Subject: [PATCH 1/2] genirq/cpuhotplug: Reduce logging level for couple of prints

During the cpu hot plug stress testing, couple of messages
continuous flooding on to the console is causing timers
migration delay. Delayed time migrations from hot plugging
core is causing device instability with watchdog. So reduce
log level for couple of prints in cpu hot plug flow.

Signed-off-by: Prasad Sodagudi <psodagud@...eaurora.org>
---
 arch/arm64/kernel/smp.c | 2 +-
 kernel/irq/cpuhotplug.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 355ee9e..08da6e3 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -338,7 +338,7 @@ 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_info("CPU%u: shutdown\n", cpu);
 
 	/*
 	 * Now that the dying CPU is beyond the point of no return w.r.t.
diff --git a/kernel/irq/cpuhotplug.c b/kernel/irq/cpuhotplug.c
index 02236b1..82802e0 100644
--- a/kernel/irq/cpuhotplug.c
+++ b/kernel/irq/cpuhotplug.c
@@ -42,7 +42,7 @@ static inline bool irq_needs_fixup(struct irq_data *d)
 		 * If this happens then there was a missed IRQ fixup at some
 		 * point. Warn about it and enforce fixup.
 		 */
-		pr_warn("Eff. affinity %*pbl of IRQ %u contains only offline CPUs after offlining CPU %u\n",
+		pr_info("Eff. affinity %*pbl of IRQ %u contains only offline CPUs after offlining CPU %u\n",
 			cpumask_pr_args(m), d->irq, cpu);
 		return true;
 	}
@@ -166,7 +166,7 @@ void irq_migrate_all_off_this_cpu(void)
 		raw_spin_unlock(&desc->lock);
 
 		if (affinity_broken) {
-			pr_warn_ratelimited("IRQ %u: no longer affine to CPU%u\n",
+			pr_info_ratelimited("IRQ %u: no longer affine to CPU%u\n",
 					    irq, smp_processor_id());
 		}
 	}
-- 
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