linux-kernel - Re: [discuss] Re: [PATCH] Allow all Opteron processors to change pstate at same time

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Date:	Mon, 17 Jul 2006 09:37:10 +0200
From:	"Joachim Deguara" <joachim.deguara@....com>
To:	"Pavel Machek" <pavel@...e.cz>
cc:	"shin, jacob" <jacob.shin@....com>, "Andi Kleen" <ak@...e.de>,
	"Langsdorf, Mark" <mark.langsdorf@....com>, discuss@...-64.org,
	linux-kernel@...r.kernel.org, cpufreq@...ts.linux.org.uk
Subject: Re: [discuss] Re: [PATCH] Allow all Opteron processors to
 change pstate at same time

On Sun, 2006-07-16 at 03:56 +0200, Pavel Machek wrote:
> > On Thu, 2006-07-13 at 13:06 +0000, Pavel Machek wrote:
> > > Can you run two such tests *in parallel*? That seemed to break it
> > > really quickly.
> > parallel sounds fun, but I don't get it.  Two machine or trying to
> go
> > online and offline at the same time?  Firestorming two busy parallel
> 
> Trying to online and offline at the same time.
> 
> > while loops, one turning the core offline and the other online, did
> not
> > bring an oops so I guess this kernel is in the clear in that regard.
> 
> Better run two tight loops, each doing online; offline. I got reports
> it crashed machines before, but maybe it is solved. 

yeah, that's what I did. Somethings are easier described in bash than in
english.  Nothing crashed or oopsed so the green light is there for
online and offline in 2.6.18-rc1 (with my setup).

-joachim



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