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

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Message-ID: <20060720155909.GA31504@atrey.karlin.mff.cuni.cz>
Date:	Thu, 20 Jul 2006 17:59:09 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	Joachim Deguara <joachim.deguara@....com>
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).

Okay, I tried hard here, and reproduced some fork failures (and swsusp
panic :-), but not oops.

								Pavel
-- 
Thanks, Sharp!
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