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This avoids the long times associated with a full reboot, and can help systems to meet high-availability requirements by minimizing downtime. [1] [2] While feasible, implementing a mechanism such as kexec raises two major challenges: Memory of the currently running kernel is overwritten by the new kernel, while the old one is still executing.
The default value of kernel.sysrq in distributions such as Ubuntu and Debian remains 176 [citation needed] (allowing the sync, unmount, and reboot functions) and 438 [10] (allowing the same functions plus loglevel, unraw, and nice-all-RT-tasks) respectively.
Availability refers to the ability of the user community to obtain a service or good, access the system, whether to submit new work, update or alter existing work, or collect the results of previous work. If a user cannot access the system, it is – from the user's point of view – unavailable. [2]
sysfs is a pseudo file system provided by the Linux kernel that exports information about various kernel subsystems, hardware devices, and associated device drivers from the kernel's device model to user space through virtual files. [1]
The Completely Fair Scheduler (CFS) was a process scheduler that was merged into the 2.6.23 (October 2007) release of the Linux kernel. It was the default scheduler of the tasks of the SCHED_NORMAL class (i.e., tasks that have no real-time execution constraints) and handled CPU resource allocation for executing processes , aiming to maximize ...
A physical Wake-on-LAN connector (white object in foreground) featured on the IBM PCI Token-Ring Adapter 2. Wake-on-LAN (WoL or WOL) [a] is an Ethernet or Token Ring computer networking standard that allows a computer to be turned on or awakened from sleep mode by a network message.
The CFS scheduler was the de facto standard for 16+ years ... Used in Ubuntu 22.04 LTS on newer hardware [71] ... Initial reboot support [493] Jump from 0.12 to 0.95 ...
Linus Benedict Torvalds (/ ˈ l iː n ə s ˈ t ɔːr v ɔː l d z / ⓘ LEE-nəs TOR-vawldz, [3] Finland Swedish: [ˈliːnʉs ˈtuːrvɑlds] ⓘ; born 28 December 1969) is a Finnish software engineer who is the creator and lead developer of the Linux kernel.