Tag
interrupt-injection
- Jul 23, 2026 Virtualizing the Local APIC: Access Pages, Virtual Interrupt Delivery, and Posted Interrupts Why every interrupt acknowledgement used to cost an exit, how hardware removed the exit for the common case, and what a posted interrupt descriptor does between the device and the guest. virtualization
- Dec 2, 2025 Interrupt Delivery Inside a Virtual Machine Why injecting an interrupt into a guest can cost a world switch, how posted interrupts and APIC virtualization remove that cost, and what remains expensive. operating systems