linux-kernel - [PATCH] x86/mce: count the number of occurrences of each MCE severity

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Message-Id: <20240618124331.12729-1-qirui.001@bytedance.com>
Date: Tue, 18 Jun 2024 20:43:31 +0800
From: "$(name)" <qirui.001@...edance.com>
To: tony.luck@...el.com,
	bp@...en8.de,
	tglx@...utronix.de,
	mingo@...hat.com,
	dave.hansen@...ux.intel.com,
	hpa@...or.com
Cc: x86@...nel.org,
	linux-edac@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Rui Qi <qirui.001@...edance.com>
Subject: [PATCH] x86/mce: count the number of occurrences of each MCE severity

From: Rui Qi <qirui.001@...edance.com>

In the current implementation, we can only know whether each MCE
severity has occurred, and cannot know how many times it has occurred
accurately. This submission supports viewing how many times each MCE
severity has occurred.

Due to the limitation of char type, the maximum supported statistics are
currently 255 times

Signed-off-by: Rui Qi<qirui.001@...edance.com>
---
 arch/x86/kernel/cpu/mce/severity.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/mce/severity.c b/arch/x86/kernel/cpu/mce/severity.c
index dac4d64dfb2a..a81e34c6e3ee 100644
--- a/arch/x86/kernel/cpu/mce/severity.c
+++ b/arch/x86/kernel/cpu/mce/severity.c
@@ -405,7 +405,7 @@ static noinstr int mce_severity_intel(struct mce *m, struct pt_regs *regs, char
 			continue;
 		if (msg)
 			*msg = s->msg;
-		s->covered = 1;
+		s->covered++;
 
 		return s->sev;
 	}
-- 
2.20.1