Commit-ID: 9b45ef443acde55526485db37440cd3e8f03d544 Gitweb: http://git.kernel.org/tip/9b45ef443acde55526485db37440cd3e8f03d544 Author: Borislav Petkov <b...@suse.de> AuthorDate: Wed, 12 Aug 2015 18:29:42 +0200 Committer: Ingo Molnar <mi...@kernel.org> 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" <gong.c...@linux.intel.com>. Signed-off-by: Borislav Petkov <b...@suse.de> Cc: Gong Chen <gong.c...@linux.intel.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Cc: Tony Luck <tony.l...@intel.com> Link: http://lkml.kernel.org/r/1439396985-12812-11-git-send-email...@alien8.de Signed-off-by: Ingo Molnar <mi...@kernel.org> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
