system-calls

1 free lesson tagged system-calls across Computer Science. Each one is a short sequence of focused steps with narration and a five-question quiz at the end — take them in any order, no signup required.

Computer Science

intermediate

Syscalls and the Kernel Boundary

User code cannot touch a disk, a network card, or another process's memory without crossing into the kernel, and the crossing is not free. This lesson covers ring transitions and the syscall path, interrupts versus traps versus exceptions, measured boundary costs, why vDSO and io_uring exist, and how namespaces plus cgroups turn ordinary kernel features into containers.

11 steps·~17 min

Syscalls and the Kernel Boundary

Related topics