linux-kernel - [PATCH] watchdog/hardlockup: set watchdog_hardlockup

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Message-Id: <20230805160144.121875-1-liusong@linux.alibaba.com>
Date:   Sun,  6 Aug 2023 00:01:44 +0800
From:   Liu Song <liusong@...ux.alibaba.com>
To:     akpm@...ux-foundation.org, dianders@...omium.org, pmladek@...e.com
Cc:     liusong@...ux.alibaba.com, linux-kernel@...r.kernel.org
Subject: [PATCH] watchdog/hardlockup: set watchdog_hardlockup_warned to true as early as possible

Since we want to ensure only printing hardlockups once, it is necessary
to set "watchdog_hardlockup_warned" to true as early as possible.

Signed-off-by: Liu Song <liusong@...ux.alibaba.com>
---
 kernel/watchdog.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 25d5627a6580..c4795f2d148c 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -180,6 +180,8 @@ void watchdog_hardlockup_check(unsigned int cpu, struct pt_regs *regs)
 		/* Only print hardlockups once. */
 		if (per_cpu(watchdog_hardlockup_warned, cpu))
 			return;
+		else
+			per_cpu(watchdog_hardlockup_warned, cpu) = true;
 
 		pr_emerg("Watchdog detected hard LOCKUP on cpu %d\n", cpu);
 		print_modules();
@@ -206,8 +208,6 @@ void watchdog_hardlockup_check(unsigned int cpu, struct pt_regs *regs)
 
 		if (hardlockup_panic)
 			nmi_panic(regs, "Hard LOCKUP");
-
-		per_cpu(watchdog_hardlockup_warned, cpu) = true;
 	} else {
 		per_cpu(watchdog_hardlockup_warned, cpu) = false;
 	}
-- 
2.19.1.6.gb485710b