From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752779AbbHMKuO (ORCPT ); Thu, 13 Aug 2015 06:50:14 -0400 Received: from terminus.zytor.com ([198.137.202.10]:53075 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751943AbbHMKuJ (ORCPT ); Thu, 13 Aug 2015 06:50:09 -0400 Date: Thu, 13 Aug 2015 03:49:18 -0700 From: tip-bot for Borislav Petkov Message-ID: Cc: gong.chen@linux.intel.com, bp@suse.de, tony.luck@intel.com, hpa@zytor.com, tglx@linutronix.de, peterz@infradead.org, mingo@kernel.org, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org Reply-To: gong.chen@linux.intel.com, bp@suse.de, tglx@linutronix.de, hpa@zytor.com, tony.luck@intel.com, peterz@infradead.org, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, mingo@kernel.org In-Reply-To: <1439396985-12812-11-git-send-email-bp@alien8.de> References: <1439396985-12812-11-git-send-email-bp@alien8.de> To: linux-tip-commits@vger.kernel.org Subject: [tip:ras/core] RAS: Add a menuconfig option with descriptive text Git-Commit-ID: 9b45ef443acde55526485db37440cd3e8f03d544 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 9b45ef443acde55526485db37440cd3e8f03d544 Gitweb: http://git.kernel.org/tip/9b45ef443acde55526485db37440cd3e8f03d544 Author: Borislav Petkov AuthorDate: Wed, 12 Aug 2015 18:29:42 +0200 Committer: Ingo Molnar CommitDate: Thu, 13 Aug 2015 10:12:53 +0200 RAS: Add a menuconfig option with descriptive text Text taken a previous patch from "Gong Chen" . Signed-off-by: Borislav Petkov Cc: Gong Chen Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Tony Luck Link: http://lkml.kernel.org/r/1439396985-12812-11-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar --- drivers/ras/Kconfig | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) diff --git a/drivers/ras/Kconfig b/drivers/ras/Kconfig index f9da613..e5f0a43 100644 --- a/drivers/ras/Kconfig +++ b/drivers/ras/Kconfig @@ -1,2 +1,32 @@ -config RAS - bool +menuconfig RAS + bool "Reliability, Availability and Serviceability (RAS) 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