linux-kernel - Re: [RFC][PATCH 0/2] reworking load_balance

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Message-Id: <47B42167.BA47.005A.0@novell.com>
Date:	Thu, 14 Feb 2008 09:09:27 -0700
From:	"Gregory Haskins" <ghaskins@...ell.com>
To:	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Arjan van de Ven" <arjan@...radead.org>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Dhaval Giani" <dhaval@...ux.vnet.ibm.com>,
	"Srivatsa Vaddagiri" <vatsa@...ux.vnet.ibm.com>,
	"Paul Jackson" <pj@....com>
Cc:	"LKML" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH 0/2] reworking load_balance_monitor

>>> On Thu, Feb 14, 2008 at 10:57 AM, in message
<20080214155724.772744000@...llo.nl>, Peter Zijlstra <a.p.zijlstra@...llo.nl>
wrote: 
> Hi,
> 
> Here the current patches that rework load_balance_monitor.
> 
> The main reason for doing this is to eliminate the wakeups the thing 
> generates,
> esp. on an idle system. The bonus is that it removes a kernel thread.
> 
> Paul, Gregory - the thing that bothers me most atm is the lack of
> rd->load_balance. Should I introduce that (-rt ought to make use of that as
> well) by way of copying from the top sched_domain when it gets created?

With the caveat that I currently have not digested your patch series, this sounds like a reasonable approach.  The root-domain effectively represents the top sched-domain anyway (with the additional attribute that its a shared structure with all constituent cpus).

Ill try to take a look at the series later today and get back to you with feedback.

-Greg

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