user space

(redirected from Userspace)

user space

(1) The memory allocated to applications in a computer that uses an operating system like Linux. Such operating systems keep their kernel in one area of memory (kernel space) with user applications in another. The system prevents the user's applications in user space from accessing any instructions in kernel space.

Programs in user space are typically swapped to and from disk when other programs take precedent (see virtual memory); however, all or most of the kernel resides in physical memory at all times.

(2) A designated part of a website that is set up for users to download files or contribute material.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
Mentioned in ?
References in periodicals archive ?
"The implant runs completely in userspace, albeit unsandboxed and as root with entitlements chosen by the attacker to ensure they can still access all the private data they are interested in," says the report.
(i) The processors provide a new operating mode called guest mode, in addition to the previous two modes, the userspace mode and the kernel mode (the basic scheme of guest system operation is given in Figure 1).
Communication between the PRU and userspace programs is carried out by a privileged userspace process; a functional diagram outlining the implementation is given in Figure 4.
This is possible with the help of CRIU (Checkpoint/Restore In Userspace) and P.Haul, whose sole purpose is to facilitate live migration of containers along with memory-touching processes inside.
A discussion of processes in userspace follows, and buffer function and structure are elucidated along with a description of multiprocess files and interprocess communication.
[10] Filesystem in Userspace, http://fuse.sourceforge.net/.
The vulnerability, described byLookout Mobile Securityas a failure to restrict kernel address space mapped to userspace via /dev/exynos-mem, is present in devices that use Samsung's 4210 and 4412 Exynos processors.
The client applications exist in three main versions: the standalone application, the core module of the operating system and Filesystem in Userspace (FUSE).
The nProbe and fprobe were lacking far behind ipt_netflow even when the PF_RING sockets were used because these tools do the packet analysis in userspace which requires time-consuming context switches.