How to mask IRQ

[Eric Valette]

Sergei Organov wrote:

> It could be an alternative solution to throw away the idea of automatic
> management of nested interrupts and their priorities altogether. Instead
> of emulating priority IC in software, let the threads scheduler handle
> priorities by delegating most of the work from IRQ handlers level to the
> task level. This way you will have simple and fast IRQ dispatcher that
> won't touch IRQ masks at all allowing you to manage them whatever way
> you wish.

Unfortunately, the overhead of thread context switch is usually far too
high to be ued in RT systems.

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