Messages in this thread | | | From | Daniel Phillips <> | Subject | Re: [2.4.17/18pre] VM and swap - it's really unusable | Date | Mon, 14 Jan 2002 06:59:35 +0100 |
| |
On January 13, 2002 04:59 pm, Alan Cox wrote: > > > I disable a single specific interrupt, I don't disable the timer interrupt. > > > Your code doesn't seem to handle that. > > > > It can if we increment the preempt_count in disable_irq_nosync and > > decrement it on enable_irq. > > A driver that knows about how its irq is handled and that it is sole > user (eg ISA) may and some do leave it disabled for hours at a time
Good point. Preemption would be disabled for that thread if we mindlessly shut it off for every irq_disable. For that driver we probably just want to leave preemption enabled, it can't hurt.
-- Daniel - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |