linux-kernel - Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges

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Message-ID: <Pine.LNX.4.64.0802291325580.13402@schroedinger.engr.sgi.com>
Date:	Fri, 29 Feb 2008 13:29:22 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Andrea Arcangeli <andrea@...ranet.com>
cc:	Nick Piggin <nickpiggin@...oo.com.au>, akpm@...ux-foundation.org,
	Robin Holt <holt@....com>, Avi Kivity <avi@...ranet.com>,
	Izik Eidus <izike@...ranet.com>,
	kvm-devel@...ts.sourceforge.net,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	general@...ts.openfabrics.org,
	Steve Wise <swise@...ngridcomputing.com>,
	Roland Dreier <rdreier@...co.com>,
	Kanoj Sarcar <kanojsarcar@...oo.com>, steiner@....com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	daniel.blueman@...drics.com
Subject: Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges

On Fri, 29 Feb 2008, Andrea Arcangeli wrote:

> I don't have a strong opinion if it should become a semaphore
> unconditionally or only with a CONFIG_XPMEM=y. But keep in mind
> preempt-rt runs quite a bit slower, or we could rip spinlocks out of
> the kernel in the first place ;)

D you just skip comments of people on the mmu_notifier? It took me to 
remind you about Andrew's comments to note those. And I just responded on 
the XPmem issue in the morning.
 
Again for the gazillionth time: There will be no CONFIG_XPMEM because the 
functionality needs to be generic and not XPMEM specific.

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