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Date: Sun, 17 Mar 2002 17:48:02 -0800 (PST)
From: Davide Libenzi <davidel@xmailserver.org>
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To: Mike Fedyk <mfedyk@matchmail.com>
cc: Rik van Riel <riel@conectiva.com.br>,
        Linus Torvalds <torvalds@transmeta.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [Lse-tech] Re: 10.31 second kernel compile
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On Sun, 17 Mar 2002, Mike Fedyk wrote:

> On Sun, Mar 17, 2002 at 05:13:16PM -0800, Davide Libenzi wrote:

> > What's the reason that would make more convenient for us, upon receiving a
> > request to map a NNN MB file, to map it using 4Kb pages instead of 4MB ones ?
>
> ... the VM chooses to unmap a mmaped page, it chooses a 4mb page, later it
> needs just a few bytes from that unmaped page and free 4mb instead of 4kb (worst
> case) to map that page again...

The big-page property should be vma related and should be obviously
handled correctly ...



- Davide


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