Hello!
> However, it seems many drivers seem to still use BHs (immediate, or their
> own). Is this because they just haven't moved to tasklets?
Yes. It is not so direct task. BHs are globally serialized on SMP
(i.e. only one BH can run at any moment); tasklets are not.
F.e. driver, using BHs, was allowed not to be bothered that
a timer can run simultaneously with its BH. So, drivers require auditing.
> Or is it that
> tasklets are reserved for special use?
No.
> Can an interrupt handler safely
> call tasklet_schedule()?
Yes. It can be called from any context.
Alexey
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