37 строки
1.5 KiB
Plaintext
37 строки
1.5 KiB
Plaintext
# 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
|