linux-kernel - [PATCH] [23/28] x86: MCE: Improve documentation

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Date:	Tue,  7 Apr 2009 17:08:06 +0200 (CEST)
From:	Andi Kleen <andi@...stfloor.org>
To:	seto.hidetoshi@...fujitsu.com, hpa@...or.com,
	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...utronix.de
Subject: [PATCH] [23/28] x86: MCE: Improve documentation


Document that check_interval set to 0 means no polling.
Noticed by Hidetoshi Seto

Also add a reference from boot options to the sysfs tunables

Cc: seto.hidetoshi@...fujitsu.com

Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 Documentation/x86/x86_64/boot-options.txt |    2 ++
 Documentation/x86/x86_64/machinecheck     |    4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

Index: linux/Documentation/x86/x86_64/machinecheck
===================================================================
--- linux.orig/Documentation/x86/x86_64/machinecheck	2009-04-07 16:09:59.000000000 +0200
+++ linux/Documentation/x86/x86_64/machinecheck	2009-04-07 16:09:59.000000000 +0200
@@ -41,7 +41,9 @@
 	the polling interval.  When the poller stops finding MCEs, it
 	triggers an exponential backoff (poll less often) on the polling
 	interval. The check_interval variable is both the initial and
-	maximum polling interval.
+	maximum polling interval. 0 means no polling for corrected machine
+	check errors (but some corrected errors might be still reported
+	in other ways)
 
 tolerant
 	Tolerance level. When a machine check exception occurs for a non
Index: linux/Documentation/x86/x86_64/boot-options.txt
===================================================================
--- linux.orig/Documentation/x86/x86_64/boot-options.txt	2009-04-07 16:09:59.000000000 +0200
+++ linux/Documentation/x86/x86_64/boot-options.txt	2009-04-07 16:09:59.000000000 +0200
@@ -5,6 +5,8 @@
 
 Machine check
 
+   Please see Documentation/x86/x86_64/machinecheck for sysfs runtime tunables.
+
    mce=off disable machine check
    mce=bootlog Enable logging of machine checks left over from booting.
                Disabled by default on AMD because some BIOS leave bogus ones.
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