Re: + maps2-export-page-index-in-kpagemap.patch added to -mm tree

[Matt Mackall <mpm@selenic.com>]

On Mon, Sep 24, 2007 at 02:23:08PM -0700, Dave Hansen wrote:
> On Mon, 2007-09-24 at 15:59 -0500, Matt Mackall wrote:
> > 
> > If we really must do this, it'd be better to have a parallel file with
> > the offsets.
> 
> Yeah, I'd much rather have a couple of files with really, really simple
> and _stable_ formats than one with a more complex and variable one.  
> 
> Although you can't answer the "which parts are mapped" question without
> the page_index() information, you can answer the "what percentage of
> this file is actively mapped" question.
> 
> Could someone elaborate a little bit more on exactly why you'd want to
> know which parts of the file are mapped? 

Google codesearch finds one actual user of remap_file_pages (and
-lots- of false positives) in an obscure webserver, so I think the
answer somehow involves Oracle.

-- 
Mathematics is the supreme nostalgia of our time.

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