linux-kernel - [RFC 2/9] mce: save most severe error information

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Message-Id: <4ddadbe91716015857@agluck-desktop.sc.intel.com>
Date:	Mon, 23 May 2011 15:12:57 -0700
From:	"Luck, Tony" <tony.luck@...el.com>
To:	linux-kernel@...r.kernel.org
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Huang, Ying" <ying.huang@...el.com>,
	"Andi Kleen" <andi@...stfloor.org>,
	"Borislav Petkov" <bp@...en8.de>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>
Subject: [RFC 2/9] mce: save most severe error information

From: Tony Luck <tony.luck@...el.com>

monarch clears all of the per cpu "mces_seen", so we must keep a copy
to use after mce_end()

Signed-off-by: Tony Luck <tony.luck@...el.com>
---
 arch/x86/kernel/cpu/mcheck/mce.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 3385ea2..ed1542a 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1046,6 +1046,9 @@ void do_machine_check(struct pt_regs *regs, long error_code)
 		}
 	}
 
+	/* Save our worst error locally, monarch will clear mces_seen */
+	m = *final;
+
 	if (!no_way_out)
 		mce_clear_state(toclear);
 
@@ -1064,7 +1067,7 @@ void do_machine_check(struct pt_regs *regs, long error_code)
 	 * support MCE broadcasting or it has been disabled.
 	 */
 	if (no_way_out && tolerant < 3)
-		mce_panic("Fatal machine check on current CPU", final, msg);
+		mce_panic("Fatal machine check on current CPU", &m, msg);
 
 	/*
 	 * If the error seems to be unrecoverable, something should be
-- 
1.7.3.1

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