Messages in this thread | | | Date | Tue, 1 May 2007 16:27:43 -0700 | From | Bill Irwin <> | Subject | Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm patch] i386: enable 4k stacks by default) |
| |
On Tue, May 01, 2007 at 05:36:06PM -0500, Matt Mackall wrote: >>> Can we register them lazily at request_irq time?
On Tue, May 01, 2007 at 03:51:25PM -0700, Bill Irwin wrote: >> These IRQ stacks are per-cpu, not per-IRQ. It may make sense to >> implement per-IRQ stacks, in which case dynamic allocation at the time >> of request_irq() will make sense. >> Would you like me to implement per-IRQ IRQ stacks?
On Tue, May 01, 2007 at 06:15:48PM -0500, Matt Mackall wrote: > It's probably the "right" thing to do, but it does have higher > overhead for most systems. > But it also gives a very obvious migration path to -rt's irq threads.
Well, I don't really know how much of -rt or which pieces of it are really going in. Otherwise it favors large-scale i386, which people largely want to ignore/break/etc. I'll err on the side of caution and not change it.
-- wli - 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/
| |