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

[Borislav Petkov <bp@alien8.de>]

On Wed, Apr 16, 2014 at 02:33:01AM -0400, Chen, Gong wrote:
> 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:

Good. Just nitpicks below:

>          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

s/it/the system/. "it" is kinda misleading as to what we refer to.

>          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.

Nice!

>          Note that reliability and availability are distinct concepts:

capitalized: ... that Reliability and Availability are ...

>          Reliability is a measure of the ability of a system to function
>          correctly, including avoiding data corruption, whereas availability

ditto: 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.

Very good description! :-)

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
--