Re: nohz: Warn if the machine can not perform nohz_full

From: Dave Jones
Date: Mon Jul 15 2013 - 14:56:41 EST


On Mon, Jul 15, 2013 at 02:49:42PM -0400, Steven Rostedt wrote:

> > And here's a Core Duo from circa 2008.
> > http://paste.fedoraproject.org/25429/13739098/raw
> >
> > Two for two so far. I get the feeling you guys are going to get a ton of these reports.
>
> Hmm, we should only warn if the user tried to enable nohz-full via the
> command line. But it looks like it warns even without enabling
> nohz-full, which wasn't the desired effect.
>
> I'll look at this, and send a patch to make sure the warning only
> happens when the user tries to use nohz-full, and doesn't just compile
> it in. The point of the patch is to not let the user think they have
> nohz-full when they don't.

Is a printk not enough for that purpose ? Tainting the kernel is kinda anti-social.

Dave

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