Date: Thu, 7 Jan 2010 21:00:34 -0800 (PST)
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Arjan van de Ven <arjan@infradead.org>
cc: Christoph Lameter <cl@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()
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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.

Well, in all fairness, I doubt other kernels do any better. So changing 
the app is likely to help in general, and thus be at least part of the 
right solution.

But as outlined, we _can_ almost certainly do better on many simple and 
common cases, so changing the kernel - in addition to fixing app memory 
allocation patterns - sounds like a good avenue.

			Linus
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