From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Mon, 17 Jul 2006 16:05:27 GMT
Subject: Re: comparing file contents in is_exact_match?
Message-ID: <Pine.LNX.4.63.0607171804030.29667@wbgn013.biozentrum.uni-wuerzburg.de>
In-Reply-To: <Pine.LNX.4.64.0607170840280.15611@evo.osdl.org>

Hi,

On Mon, 17 Jul 2006, Linus Torvalds wrote:

> On Mon, 17 Jul 2006, Johannes Schindelin wrote:
> > 
> > But note that we usually use the whole contents of the mmap()ed file 
> > anyway.
> 
> Not for pack-files, though. You may have a half-gigabyte pack-file, and 
> only use a small small fraction of it.

Right.

> (You also never really rename them, so windows should be fine for that 
> case)

So we could introduce a second mmap() which is normally the same as 
mmap(), except for windows, where it is a rename() and unlink() safe 
version of mmap() by reading the thing into RAM. Not very pretty.

Ciao,
Dscho