Sentry: A novel hardware implementation of classic operating system mechanisms

A hardware protection mechanism called the Sentry is introduced which requires minimal overhead to be invoked and no overhead when providing protection. It is fail-safe, fault tolerant, and can be added to most existing architectures. It provides a ...

Several commodity operating systems have used kernel extensions to extend or replace their functionalities. Generally, since the kernel extensions are executed in the same address space with the kernel, a mere fault in the extensions may lead the whole ...

With technology scaling, manufacture-time and in-field permanent faults are becoming a fundamental problem. Multi-core architectures with spares can tolerate them by detecting and isolating faulty cores, but the required fault detection coverage becomes ...