klogFlush

The `klogFlush` function is a kernel logging utility primarily used in the Linux kernel to force the immediate flushing of buffered kernel log messages to the console or log buffer. It is designed to ensure that important messages, such as those related to system errors or critical events, are not delayed and are displayed promptly.

In the Linux kernel, log messages are typically buffered for efficiency, especially in systems with high message volumes. However, certain situations—such as debugging a crash or monitoring real-time system behavior—require immediate visibility of logs. `klogFlush` addresses this need by clearing the kernel log buffer and writing all pending messages to the console or log storage.

The function is often invoked through user-space interfaces, such as the `dmesg` command with the `-F` (flush) option or via kernel debugging tools. It is also used internally by kernel subsystems that need to ensure logs are not lost during critical operations. While `klogFlush` itself is not exposed as a direct system call, it is triggered indirectly through mechanisms like the `syslog` interface or kernel debugging hooks.

Usage of `klogFlush` should be approached with caution, as excessive flushing can impact system performance due to the overhead of writing logs. It is particularly useful in scenarios where immediate feedback is required, such as troubleshooting hardware failures or verifying kernel module behavior during initialization. The function operates at the kernel level, ensuring that even low-priority messages are flushed when called.