Re: [Xen-devel] disabling irqs in a non-preemptive OS

[Matthew Fioravante <Matthew.Fioravante@xxxxxxxxxx>]

That I didn't realize. Now it makes sense, thanks!

Keir Fraser wrote:
> On 31/12/2009 23:16, "Matthew Fioravante" <Matthew.Fioravante@xxxxxxxxxx>
> wrote:
>
>   
> > mini-os is a uniprocessor and non-preemptive OS so unless your thread
> > blocks, an irq handler (in this case event channel handler) will never
> > be run and thus won't be able to touch your critical sections.
> >     
> What makes you think that? 'Non-preemptive' doesn't mean that you can't be
> interrupted by irq context. That's why they're called interrupts!
>
>  -- Keir
>
>
>

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