Re: tasklet_kill will always hang for recursive tasklets on a UP

[Werner Almesberger <wa@almesberger.net>]

Nagendra Singh Tomar wrote:
> 	While going thru the code for tasklet_kill(), I cannot figure out 
> how recursive tasklets (tasklets that schedule themselves from within 
> their tasklet handler) can be killed by this function. To me it looks that 
> tasklet_kill will never complete for such tasklets.

That's also what I found when looking at it a while ago. This isn't
necessarily a bug of tasklet_kill, just some behaviour that needs
to be documented.

You can always introduce a flag that tells the tasklet if it should
reschedule itself, and clear that flag before calling tasklet_kill.

When I looked at it (I think this was in some 2.4 kernel), it also
seemed that tasklet_kill could loop forever if the tasklet is
scheduled but disabled.

- Werner

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 / Werner Almesberger, Buenos Aires, Argentina         wa@almesberger.net /
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