diff options
| author | Borislav Petkov <bp@suse.de> | 2015-08-12 18:29:42 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-08-13 10:12:53 +0200 |
| commit | 9b45ef443acde55526485db37440cd3e8f03d544 (patch) | |
| tree | 2dc6eee4556a1295715f052fb0df93fdbe3f5fb9 /drivers | |
| parent | 1b48465500611a2dc5e75800c61ac352e22d41c3 (diff) | |
| download | linux-9b45ef443acde55526485db37440cd3e8f03d544.tar.bz2 | |
RAS: Add a menuconfig option with descriptive text
Text taken a previous patch from "Gong Chen" <gong.chen@linux.intel.com>.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Gong Chen <gong.chen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Link: http://lkml.kernel.org/r/1439396985-12812-11-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ras/Kconfig | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/drivers/ras/Kconfig b/drivers/ras/Kconfig index f9da613052c2..e5f0a43998d2 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 |