Oracle Solaris Modular Debugger Guide

Use of kmdb to Stop the Live Operating System

The use of kmdb to stop the live operating system using mdb -K or by setting a breakpoint in the live operating system is intended for use by developers and not on production systems. When the operating system kernel is stopped by kmdb, operating system services and networking are not executing, and other systems on the network that depend upon the target system will not be able to contact the target system.