Re: Measuring tools - top and interrupts

[Mike Galbraith <efault@gmx.de>]

On Sat, 2006-06-24 at 17:40 +0200, Björn Steinbrink wrote:
> On 2006.06.24 13:41:57 +0200, Mike Galbraith wrote:
> > On Sat, 2006-06-24 at 11:52 +0200, Mike Galbraith wrote:
> > > On Sat, 2006-06-24 at 11:21 +0200, Björn Steinbrink wrote:
> > > > 
> > > > The non-SMP call to update_process_times() is in do_timer_interrupt_hook(),
> > > > so I guess the above is not the Right Thing to do.
> > > 
> > > Ah, there it is.  That's what I was looking for.  I figured that doing
> > > what I did had to be wrong, but tried it for grins anyway... was pretty
> > > surprised when it worked (kinda).
> > 
> > Calling update_process_times() in do_timer_interrupt_hook() flat does
> > not work here.  Calling it in smp_local_timer_interrupt() works fine.  
> > 
> > Oh joy.
> 
> I can reproduce it now, seems to require CONFIG_4KSTACKS to fail. Can
> you confirm that?

What a coincidence.  After trying a different compiler, and slogging
through a bunch of assembler trying to figure out how the heck this can
happen, I was just booting an 8k stack kernel (as a wild-ass guess;).

let's see.  Yeah, confirmed.

	-Mike