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Subject[PATCH] [23/28] x86: MCE: Improve documentation
Date

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@jp.fujitsu.com

Signed-off-by: Andi Kleen <ak@linux.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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