tasklet broken? Quick question

tasklet broken? Quick question

[Dragan Stancevic]

Hi,

I am seeing a strange behavior when using tasklets so I was wondering if 
this is a bug or a feature and if anyone else has experienced the same 
behavior.

I am using 2.4.9 and I checked the ChangeLog and there was a fix from Andrea 
in 2.4.8 with relation to tasklets but nothing after that.

I schedule a tasklet from a network driver interrupt and what I am seeing is 
that in some cases the tasklet runs twice when I am expecting it to run once.

Here is pseudo code how it looks like:

network_interrupt(){
	tasklet_schedule()
}

tasklet_code(){
	do_stuff()
}

and here is what happens:

I get an interrupt which calls tasklet_schedule, the tasklet starts executing 
and has not exited yet and I get another interrupt that calls 
tasklet_schedule, now the tasklet code exits but in some cases it executes 
again without ever tasklet_schedule being called again, I checked this is 
done on the same cpu as the interrupt was called so thats ok. I am just not 
sure if I should be expecting that "extra" execution, I thought I shouldn't.


PS: Please Cc me on reply as I am not currently on lkml. Thanks.


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