Re: Some help on fast softint stuff...

[Matt Thomas <matt%3am-software.com@localhost>]

On May 11, 2010, at 12:25 PM, Johnny Billquist wrote:

> Johnny Billquist wrote:
>> I'm trying to understand, trace, and figure out a few things. I'm wondering 
>> a bit about softint_dispatch(), and hope someone can answer this.
>> When reading through the code, I got the feeling that you should always be 
>> at SPL_HIGH when getting into this function, but occasionally I can see that 
>> it gets called at another IPL on the VAX.
>> Is that ok? I cannot find a definitive answer right now as I am searching 
>> around...
> 
> Hmm, answering myself...
> 
> softint_dispatch() calls softint_execute() which definitely is documented as 
> must be called at splhigh.
> 
> So there would seem to be either a bug in the VAX, or else a bug in the 
> documentation for softint_execute().
> 
> Anyone who can answer which it is.
> 
> So far, I've only seen softint_dispatch() being called at SPL_HIGH and 
> SPL_SCHED
> 
> The latter, it would seem, is not correct?

And I even know why now that you mention it.  Fix committed.