# SPDX-License-Identifier: GPL-2.0-only
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menuconfig RAS
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bool "Reliability, Availability and Serviceability (RAS) features"
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help
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Reliability, availability and serviceability (RAS) is a computer
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hardware engineering term. Computers designed with higher levels
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of RAS have a multitude of features that protect data integrity
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and help them stay available for long periods of time without
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failure.
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Reliability can be defined as the probability that the system will
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produce correct outputs up to some given time. Reliability is
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enhanced by features that help to avoid, detect and repair hardware
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faults.
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Availability is the probability a system is operational at a given
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time, i.e. the amount of time a device is actually operating as the
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percentage of total time it should be operating.
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Serviceability or maintainability is the simplicity and speed with
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which a system can be repaired or maintained; if the time to repair
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a failed system increases, then availability will decrease.
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Note that Reliability and Availability are distinct concepts:
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Reliability is a measure of the ability of a system to function
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correctly, including avoiding data corruption, whereas Availability
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measures how often it is available for use, even though it may not
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be functioning correctly. For example, a server may run forever and
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so have ideal availability, but may be unreliable, with frequent
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data corruption.
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if RAS
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source "arch/x86/ras/Kconfig"
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endif
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