From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756251AbbGVIl3 (ORCPT ); Wed, 22 Jul 2015 04:41:29 -0400 Received: from mail.skyhub.de ([78.46.96.112]:47857 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756083AbbGVIkh (ORCPT ); Wed, 22 Jul 2015 04:40:37 -0400 From: Borislav Petkov To: X86-ML Cc: Tony Luck , Aravind Gopalakrishnan , LKML , Linux EDAC Subject: [RFC PATCH 1/4] RAS: Add a menuconfig option with descriptive text Date: Wed, 22 Jul 2015 10:40:25 +0200 Message-Id: <1437554428-24788-2-git-send-email-bp@alien8.de> X-Mailer: git-send-email 2.5.0.rc2.28.g6003e7f In-Reply-To: <1437554428-24788-1-git-send-email-bp@alien8.de> References: <1437554428-24788-1-git-send-email-bp@alien8.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Borislav Petkov Text taken a previous patch from "Gong Chen" . Signed-off-by: Borislav Petkov Cc: Gong Chen --- drivers/ras/Kconfig | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) diff --git a/drivers/ras/Kconfig b/drivers/ras/Kconfig index f9da613052c2..d6ddf1267a7f 100644 --- a/drivers/ras/Kconfig +++ b/drivers/ras/Kconfig @@ -1,2 +1,32 @@ -config RAS - bool +menuconfig RAS + bool "Reliability, Availability, Serviceability features" + help + Reliability, availability, and serviceability (RAS) is a computer + hardware engineering term. Computers designed with higher levels + of RAS have a multitude of features that protect data integrity + and help them stay available for long periods of time without + failure. + + Reliability can be defined as the probability that the system will + produce correct outputs up to some given time. Reliability is + enhanced by features that help to avoid, detect and repair hardware + faults. + + Availability is the probability a system is operational at a given + time, i.e. the amount of time a device is actually operating as the + percentage of total time it should be operating. + + Serviceability or maintainability is the simplicity and speed with + which a system can be repaired or maintained; if the time to repair + a failed system increases, then availability will decrease. + + Note that Reliability and Availability are distinct concepts: + Reliability is a measure of the ability of a system to function + correctly, including avoiding data corruption, whereas Availability + measures how often it is available for use, even though it may not + be functioning correctly. For example, a server may run forever and + so have ideal availability, but may be unreliable, with frequent + data corruption. + +if RAS +endif -- 2.5.0.rc2.28.g6003e7f