Re: Is there spinlocks/semaphores available for drivers?

[Nate Williams]

> :And would there still be areas of the kernel that disable multiple
> :interrupts, perhaps CAM or the network stack for instance?  What do
> :all the splbio and splnet calls translate into in this new scheme?
> :
> 
>     The entire design of the kernel is currently predicated on the spl*()
>     mechanism.  We obviously can't rip it out in a day.  I'm guessing it 
>     will probably take two years ... or never if we can eek out sufficient
>     performance with it still in place.

It is my (probably naive) understanding that BSDi has done a bunch of
work in this area, and that we should be able to leverage alot of their
work.  Having never seen it, I (bogusly?) assume they aren't using
spl*() anymore, given that they now have kernel threads.

Does anyone know more?



Nate


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