[LIP] Re: Re: A few Queries

On Sun, Jun 13, 2004 at 11:00:01AM +0530, suresh kumar wrote:
> > TASKLET_SOFTIRQ is not a type of tasklet. It's a type of softirq. If
> > you search for tasklet_init() in the kernel sources, you'll find about
> > 60 hits as of 2.6.6. Each one of them is a type of tasklet.
> Does it mean, during tasklet_init, we register a callback function which
> will be called when ever a tasklet is scheduled for execution and based on
> this function we are defining the type, and if we raise a more tasklets 
> which calls this function, then no tasklets of this same type can be
> processed simultaneously.  

Sounds good so far.

> So for network processing
> one should never use tasklets. Is that correct?

Depends on the what you're trying to do in the tasklet. In terms of
parallelism, 

softirq > tasklet > bottom half

- tasklets are built on top of softirqs.
- if you use tasklets you don't need to lock
- bottom halves have been removed in 2.6.x and replaced by tasklets
- network processing generally uses softirqs

	-Arun



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