Re: [Patch] SMP call function cleanup

[William Lee Irwin III <wli@holomorphy.com>]

On Thu, 2004-04-22 at 08:37, Anton Blanchard wrote:
>> Unless there is a need Id prefer not to. Some arches do not support IPI
>> to a cpumask, whereas they should do send to all and send to single.

On Thu, Apr 22, 2004 at 08:59:39AM -0400, James Bottomley wrote:
> This is my preference too.  Voyager is one such arch.
> If it's added, there certainly has to be some way of ensuring that the
> cpumask variant isn't used preferentially to execute on a single cpu .

Well, at the moment, anyone in need of IPI'ing > 1 cpu is IPI'ing all,
which is not swift, so bear that in mind. Though given on_one_cpu(), I
suppose they can do:

	for_each_cpu_mask(cpu, foo->mask)
		on_one_cpu(cpu, bar, ...);

which more or less avoids IPI'ing 1024 cpus to run a function on 2 or
whatever they were going on about, so they can likely code it that way.


-- wli