Re: [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver

[Benjamin Herrenschmidt]

> 
> Yes, on some implementations there can be other conditions that
> make a decrementer exception go away; there is no contradiction
> here (thankfully).  My wording was sloppy.

Some CPUs have the DEC exceptions basically edge triggered (yeah I know
it sucks). That's why, among others, the IRQ soft-disable code has code
to re-trigger DEC exceptions ASAP (by setting it to 1.. note that we
could probably use 0 here, we've been a bit conservative).

Ben.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/