Describe why a user thread must be mapped onto an available kernel thread and explain how this mapping is facilitated by an operating system? In other words, briefly describe the interface a kernel provides to enable such a mapping and discuss one of the models for mapping user threads to kernel threads.

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Describe why a user thread must be mapped onto an available kernel thread and explain how this mapping is facilitated by an operating system? In other words, briefly describe the interface a kernel provides to enable such a mapping and discuss one of the models for mapping user threads to kernel threads.
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kernel thread:-

Being a schedulable object, a kernel thread is managed by the system scheduler.

Strong implementation dependencies exist for these threads, which the system scheduler is aware of. Libraries offer user threads to make the creation of portable programs easier.

The system scheduler manages kernel threads, which are kernel entities like processes and interrupt handlers. Despite running inside a process, a kernel thread is accessible to all other threads in the system.

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