Re: Threaded interrupts for synaptic touchscreen in HTC dream

Mark Brown
2009-07-22T14:32:11Z

On Wed, Jul 22, 2009 at 04:18:26PM +0200, Thomas Gleixner wrote:
> On Wed, 22 Jul 2009, Peter Zijlstra wrote:

> > Also, how important is it that subhandler1..n run in their own thread?
> > That is, can't we let them run from the thread that is otherwise waiting
> > for the completino anyway?

> In those cases I suspect we can do that. I guess there can be async
> handling as well: the main handler queries the pending interrupts,
> masks them, wakes the handlers and returns. No wait for all threads to
> finish necessary before unmasking the main interrupt line.

The chips I'm deling with can certainly support doing that but I'm not
sure there'd be enormous advantages - a lot of the interrupt handlers
will either be trivial (eg, RTC ticks or alarms) or be serialised by a
need to interact with the chip anyway. I'd expect this to be generally
true, though ICBW.