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x86, mce: improve documentation

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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

Acked-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Andi Kleen 2009-05-27 21:56:56 +02:00 committed by H. Peter Anvin
parent b170204ddb
commit 8780e8e0f6
2 changed files with 5 additions and 1 deletions
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2
Documentation/x86/x86_64/boot-options.txt
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@ -5,6 +5,8 @@ only the AMD64 specific ones are listed here.
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.

4
Documentation/x86/x86_64/machinecheck
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@ -41,7 +41,9 @@ check_interval
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