Date: Sat, 9 Jan 2010 07:55:17 -0800
From: Arjan van de Ven <arjan@infradead.org>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
       Peter Zijlstra <a.p.zijlstra@chello.nl>,
       "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
       Peter Zijlstra <peterz@infradead.org>,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
       "linux-mm@kvack.org" <linux-mm@kvack.org>,
       "minchan.kim@gmail.com" <minchan.kim@gmail.com>,
       "hugh.dickins" <hugh.dickins@tiscali.co.uk>,
       Nick Piggin <nickpiggin@yahoo.com.au>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [RFC][PATCH 6/8] mm: handle_speculative_fault()
Message-ID: <20100109075517.4ec65b7e@infradead.org>
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	<alpine.LFD.2.00.1001070814080.7821@localhost.localdomain>
	<alpine.DEB.2.00.1001071025450.901@router.home>
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On Fri, 8 Jan 2010 09:51:49 -0600 (CST)
Christoph Lameter <cl@linux-foundation.org> wrote:

> On Thu, 7 Jan 2010, Arjan van de Ven wrote:
> 
> > if an app has to change because our kernel sucks (for no good
> > reason), "change the app" really is the lame type of answer.
> 
> We are changing apps all of the time here to reduce the number of
> system calls. 

it's fine to fix an app for something fundamental.
it sucks to need to fix an app because we decided to clear a page
inside a lock rather than outside it.


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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