linux-kernel - [PATCH v2 2/2] x86: mce: comment about MCE synchronization timeout on definition of tolerant

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Date:	Fri, 27 Feb 2015 04:58:40 +0000
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	Tony Luck <tony.luck@...el.com>, Borislav Petkov <bp@...en8.de>
CC:	Prarit Bhargava <prarit@...hat.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Junichi Nomura <j-nomura@...jp.nec.com>,
	Kiyoshi Ueda <k-ueda@...jp.nec.com>
Subject: [PATCH v2 2/2] x86: mce: comment about MCE synchronization timeout
 on definition of tolerant

commit 716079f66eac ("mce: Panic when a core has reached a timeout") changed
the behavior of mca_cfg->tolerant. So let's add comment about it.

Signed-off-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
---
 arch/x86/kernel/cpu/mcheck/mce.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git v3.19.orig/arch/x86/kernel/cpu/mcheck/mce.c v3.19/arch/x86/kernel/cpu/mcheck/mce.c
index 10359ae1f558..abdd2631036b 100644
--- v3.19.orig/arch/x86/kernel/cpu/mcheck/mce.c
+++ v3.19/arch/x86/kernel/cpu/mcheck/mce.c
@@ -69,8 +69,10 @@ struct mca_config mca_cfg __read_mostly = {
 	/*
 	 * Tolerant levels:
 	 * 0: always panic on uncorrected errors, log corrected errors
-	 * 1: panic or SIGBUS on uncorrected errors, log corrected errors
-	 * 2: SIGBUS or log uncorrected errors (if possible), log corr. errors
+	 * 1: panic or SIGBUS on uncorrected errors, log corrected errors,
+	 *    panic on MCE synchronization timeout.
+	 * 2: SIGBUS or log uncorrected errors (if possible), log corr. errors,
+	 *    no panic on MCE synchronization timeout.
 	 * 3: never panic or SIGBUS, log all errors (for testing only)
 	 */
 	.tolerant = 1,
-- 
1.9.3
--
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