linux-kernel - Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG

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Date:	Mon, 23 Nov 2009 11:30:02 -0600 (CST)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Gleb Natapov <gleb@...hat.com>
cc:	Peter Zijlstra <peterz@...radead.org>, kvm@...r.kernel.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org, avi@...hat.com,
	mingo@...e.hu, tglx@...utronix.de, hpa@...or.com, riel@...hat.com
Subject: Re: [PATCH v2 10/12] Maintain preemptability count even for
 !CONFIG_PREEMPT kernels

This adds significant overhead for the !PREEMPT case adding lots of code
in critical paths all over the place.


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