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- # SPDX-License-Identifier: GPL-2.0-only
- 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
- source "arch/x86/ras/Kconfig"
- endif
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