On Thursday 02 March 2006 15:14, Jens Axboe wrote:
[...]
Ok great we agree on everything then.
> > >
> > > I would not want to call wake_up() unless I have to. Would a
> > >
> > > smp_mb();
> > > if (waitqueue_active(&iommu_wq))
> > > ...
> > >
> > > not be sufficient?
> >
> > Probably, but one would need to be careful to not miss events this way.
>
> Definitely, as far as I can see the above should be enough...
Ok - you just need to give me a wait queue then and I would be happy
to add the wakeups to the low level code
(or you can just do it yourself if you prefer, shouldn't be very difficult ... - just
needs to be done for both swiotlb and GART iommu. The other architectures
can follow then. At the beginning using an ARCH_HAS_* ifdef might be a good
idea for easier transition for everybody)
-Andi
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