Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756665AbZDGPRY (ORCPT ); Tue, 7 Apr 2009 11:17:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758785AbZDGPIM (ORCPT ); Tue, 7 Apr 2009 11:08:12 -0400 Received: from one.firstfloor.org ([213.235.205.2]:48881 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755858AbZDGPIJ (ORCPT ); Tue, 7 Apr 2009 11:08:09 -0400 From: Andi Kleen References: <20090407507.636692542@firstfloor.org> In-Reply-To: <20090407507.636692542@firstfloor.org> To: seto.hidetoshi@jp.fujitsu.com, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@elte.hu, tglx@linutronix.de Subject: [PATCH] [23/28] x86: MCE: Improve documentation Message-Id: <20090407150806.76A7E1D0470@basil.firstfloor.org> Date: Tue, 7 Apr 2009 17:08:06 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2008 Lines: 48 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 --- 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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/