[patch powertop svn] don't suggest NO_HZ unless it's possible!

[Arjan van de Ven]

David Brownell wrote:
> This patch gets rid of a major annoyance:  it stops the "use NO_HZ!"
> suggestions on x86_64 and other platforms which can't support it.

Hi,

I both agree and disagree with this. x86_64 does support NO_HZ, you 
just need a 2.6.24 kernel or the -hrt patchkit. So I agree the current 
message isn't correct.... but I don't think just making it go away is 
right either; PowerTOP should suggest getting a tickless kernel in 
that case.

> 
> This lets the other messages -- the ones which could actually do some
> good on this system!! -- be seen.  Else, it seems like the impossible
> NO_HZ suggestion is the only one ever visible.

hmm that would be a bug; in principle the messages should rotate (but 
with a priority bias); it could be the priorities are just off...