Re: [PATCH 1/5] trace, RAS: Add basic RAS trace event

["Chen, Gong" <gong.chen@linux.intel.com>]

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On Wed, Apr 09, 2014 at 09:46:54PM +0200, Borislav Petkov wrote:
> 
> menuconfig RAS
> 	bool "Reliability, Availability, Serviceability features"
> 	help
> 	  <A nice text about what this is going to contain, i.e. RAS stuff
> 
How about this:

         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 it 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.


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