Kernel Threads

[Joseph Koshy]

Sridhar,

> I heard that even Interrupts run under kernel threads context

See ithread(9).

> How can a kernel thread yield CPU when it detects it is idle?

kthread_suspend(), or yield().  See kthread(9), mi_switch(9).

Let me also answer your questions(s) at another level: I have found
information about the kernel in the following places:

1. The section 9 manual pages
2. The FreeBSD Arch Handbook
3. The FreeBSD Handbook
4. The sources -- use 'glimpse' on a checked out -CURRENT tree.
5. Under /usr/share/doc/papers/

If you find some documentation to be missing, and you had to figure out
something non-obvious, please file a PR with sample text.

Regards,
Koshy
<jkoshy at freebsd.org>