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  2. L4 microkernel family - Wikipedia

    en.wikipedia.org/wiki/L4_microkernel_family

    WrmOS [39] is a real-time operating system based on L4 microkernel. It has own implementations of kernel, standard libraries, and network stack, supporting ARM, SPARC, x86, and x86-64 architectures. There is the paravirtualized Linux kernel (w4linux [40]) working on WrmOS. Helios is a microkernel inspired by seL4. [41]

  3. CPU modes - Wikipedia

    en.wikipedia.org/wiki/CPU_modes

    The unrestricted mode is often called kernel mode, but many other designations exist (master mode, supervisor mode, privileged mode, etc.). Restricted modes are usually referred to as user modes, but are also known by many other names (slave mode, problem state, etc.). [2] Hypervisor

  4. Protection ring - Wikipedia

    en.wikipedia.org/wiki/Protection_ring

    A host operating system kernel could use instructions with full privilege access (kernel mode), whereas applications running on the guest OS in a virtual machine or container could use the lowest level of privileges in user mode. The virtual machine and guest OS kernel could themselves use an intermediate level of instruction privilege to ...

  5. Kernel (operating system) - Wikipedia

    en.wikipedia.org/wiki/Kernel_(operating_system)

    An oversimplification of how a kernel connects application software to the hardware of a computer. A kernel is a computer program at the core of a computer's operating system that always has complete control over everything in the system. The kernel is also responsible for preventing and mitigating conflicts between different processes. [1]

  6. Preemption (computing) - Wikipedia

    en.wikipedia.org/wiki/Preemption_(computing)

    Barring the scheduler from preempting tasks while they are processing kernel functions simplifies the kernel design at the expense of system responsiveness. The distinction between user mode and kernel mode, which determines privilege level within the system, may also be used to distinguish whether a task is currently preemptable.

  7. EROS (microkernel) - Wikipedia

    en.wikipedia.org/wiki/EROS_(microkernel)

    In EROS, the kernel-provided mechanism by which one component names and invokes the services of another is a capability, using inter-process communication (IPC). By enforcing capability-protected interfaces, the kernel ensures that all communications to a process arrive via an intentionally exported interface.

  8. AOL Mail - AOL Help

    help.aol.com/products/aol-webmail

    Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.

  9. Multi-Environment Real-Time - Wikipedia

    en.wikipedia.org/wiki/Multi-Environment_Real-Time

    Kernel: resource allocation of memory, CPU time and interrupts; Kernel-mode processes including input/output (I/O) device drivers, file manager, swap manager, root process that connects the file manager to the disk (usually combined with the swap manager) Operating system supervisor; User processes