linux-kernel - Re: [PATCH] mm: MADV_WILLNEED implementation for anonymous memory

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Message-Id: <20080131014702.705f1040.akpm@linux-foundation.org>
Date:	Thu, 31 Jan 2008 01:47:02 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	hugh@...itas.com, linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	npiggin@...e.de, riel@...hat.com, mztabzr@...inter.de,
	mpm@...enic.com
Subject: Re: [PATCH] mm: MADV_WILLNEED implementation for anonymous memory

On Thu, 31 Jan 2008 10:35:18 +0100 Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:

> 
> On Thu, 2008-01-31 at 01:12 -0800, Andrew Morton wrote:
> 
> > Implementation-wise: make_pages_present() _can_ be converted to do this. 
> > But it's a lot of patching, and the result will be a cleaner, faster and
> > smaller core MM.  Whereas your approach is easy, but adds more code and
> > leaves the old stuff slow-and-dirty.
> > 
> > Guess which approach is preferred? ;)
> 
> Ok, I'll look at using make_pages_present().

Am still curious to know what inspired this change.  What are the use
cases?  Performance testing results, etc?
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