linux-kernel - Re: Slow down stupid pounders

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Date:	Tue, 6 May 2014 13:22:04 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	lkml <linux-kernel@...r.kernel.org>, x86-ml <x86@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Mel Gorman <mgorman@...e.com>,
	Mike Galbraith <mgalbraith@...e.de>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: Slow down stupid pounders

On Tue, May 06, 2014 at 07:08:54AM -0400, Steven Rostedt wrote:
> Hey, I'm one of those that jerk off to CPU hotplug stress test scripts!

I know you are, Mike gave me your script. Like you haven't done enough!

:-P

> We were just bitching about this yesterday, but -rt related. As
> anything crap in mainline just becomes exponentially more crap in -rt.
> The CPU hotplug case becomes a mountain of crap that we just dig
> tunnels through to get by.
> 
> A while ago Thomas had a proof of concept patch I believe that was
> suppose to pick up traction but unfortunately never went anywhere, even
> after being told it would.
> 
> The real option is to rewrite cpu hotplug.

I know, and we might get lucky, after all.

I'm proposing this as a temporary thing until we have the real deal in
place. I simply would like to shoo those pounding beaks in the interim.

:-)

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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