Other kernel threads

Linux uses many other kernel threads. Some of them are created in the initialization phase and run until shutdown; others are created "on demand," when the kernel must execute a task that is better performed in its own execution context.

The most important kernel threads (beside process 0 and process 1) are:

Executes the tasks in the qt_context task queue (see Section 4.7.3).

kapm

Handles the events related to the Advanced Power Management (APM).

kswapd

Performs memory reclaiming, as described in Section 16.7.7. kflushd (also bdflush)

Flushes "dirty" buffers to disk to reclaim memory, as described in Section 14.2.4. kupdated

Flushes old "dirty" buffers to disk to reduce risks of filesystem inconsistencies, as described in Section 14.2.4.

ksoftirqd

Runs the tasklets (see section Section 4.7); there is one kernel thread for each CPU in the system.

I [email protected] RuBoard

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