linux-kernel - Re: [PATCH 1/3] sched: enable interrupts and drop rq-lock during newidle balancing

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Message-ID: <Pine.LNX.4.58.0806232011220.8540@gandalf.stny.rr.com>
Date:	Mon, 23 Jun 2008 20:11:54 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Gregory Haskins <ghaskins@...ell.com>
cc:	mingo@...e.hu, tglx@...utronix.de, linux-kernel@...r.kernel.org,
	peterz@...radead.org, linux-rt-users@...r.kernel.org,
	dbahi@...ell.com
Subject: Re: [PATCH 1/3] sched: enable interrupts and drop rq-lock during
 newidle balancing



On Mon, 23 Jun 2008, Gregory Haskins wrote:

>
> We do find_busiest_groups() et. al. without locks held for normal balancing,
> so lets do it for newidle as well.  It will allow other cpus to make
> forward progress (against our RQ) while we try to balance and allow
> some interrupts to occur.
>

I don't see anything wrong with this patch. I'll probably queue it up for
-rt8 since it is too late for -rt7.

-- Steve

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