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Subject: Re: [RFC][PATCH 1/2] sched: higher granularity load on 64bit
	systems
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: David Miller <davem@davemloft.net>
Cc: mingo@elte.hu, dhaval@linux.vnet.ibm.com, vatsa@in.ibm.com,
       dmitry.adamushko@gmail.com, linux-kernel@vger.kernel.org, efault@gmx.de
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Date: Thu, 24 Apr 2008 08:47:20 +0200
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On Wed, 2008-04-23 at 17:27 -0700, David Miller wrote:
> From: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Date: Thu, 24 Apr 2008 00:07:56 +0200
> 
> > The below is an RFC because for some reason it regresses kbuild by 5% on
> > my machine (and more on the largesmp that are the reason for it).
> 
> This causes my 64-cpu Niagara2 box to completely hang when I run "make
> clean" on a kernel tree after a fresh bootup.
> 
> Can we just revert all of this broken code until it's sorted out? :-/
> 
> We're going on 4 days with unfixed major regressions from the
> scheduler tree merge, and these regressions make systems unusable.
> 
> This is blocking my own work, and I'm starting to lose my patience.

Yes, this is all rather embarassing - if you want a revert of the
offending patches I can spin you one, and if this isn't solved quickly
I'm afraid we'll indeed have to revert in -linus :-/

Sorry about this.