Re: [PATCH -mm] extend sysrq-p functionality to cover all CPUs

[Rik van Riel <riel@surriel.com>]

On Mon, 10 Mar 2008 09:24:13 -0700
Andrew Morton <akpm@linux-foundation.org> wrote:

> > however just
> > sysrq-p seems like a waste to have because it will probably not
> > print anything useful on a large CPU system...
> 
> Yeah, sometimes it helps to keep hitting it until you get the right CPU,
> but that rather depends on interrupt distribution.
> 
> It would be neat to suppress the trace for idle CPUs.  I don't _think_
> there's a need to display the trace for idle CPUs in sysrq-P?
> 
> > If you still want it to be a separate letter, just let me know
> > which one of the last four I should take.
> 
> l :)

OK, I'll do that.  I will also change the show_lock to spinlock_irq_save
just in case sysrq-p gets invoked from multiple cpus simultaneously.

I'll send you the updated patch in a separate email, so the changelog
and commit logs do not have this discussion.