Linux Kernel/User Communication
The Linux kernel hsa several mechanisms for delivering
device and subsystem notification messages to userspace. /sbin/hotplug is the recommended choice since it provides a relatively simple interface for kernel users, and a relatively simple plug-in architecture for userspace policy. The evolution of the driver model in 2.5 has centralized the /sbin/hotplug calls, making it easier for subsystems to provide user notification.
This talk will discuss the relative benefits that /sbin/hotplug has over other existing notification mechanisms, such as procfs, sysfs, and device nodes. It will also cover some of the short comings that /sbin/hotplug has, in hopes of uncovering a better solution for 2.7 and future kernels.
