linux-kernel - Re: High priority tasks break SMP balancer?

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Message-ID: <Pine.LNX.4.64.0711151328090.29711@schroedinger.engr.sgi.com>
Date:	Thu, 15 Nov 2007 13:28:55 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Micah Dowty <micah@...are.com>
cc:	Kyle Moffett <mrmacman_g4@....com>,
	Cyrus Massoumi <cyrusm@....net>,
	LKML Kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>, Andrew Morton <akpm@...l.org>,
	Mike Galbraith <efault@....de>, Paul Menage <menage@...gle.com>
Subject: Re: High priority tasks break SMP balancer?

On Thu, 15 Nov 2007, Micah Dowty wrote:

> Yes, the Python test harness crashes, not the kernel. It's just
> because on a kernel which exhibits this SMP balancer bug, within a
> couple of test iterations I'll hit a case where cpu1 was almost
> totally idle and the test harness divides by zero when calculating the
> imbalance.

I still have some problem understanding what you are complaining about? 
The patch that you bisected had some issues that were fixed later by 
Siddha.

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