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Subject: Re: [PATCH] TCP Zero Copy for mmapped files
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Larry McVoy <lm@bitmover.com>
Cc: Thomas Ogrisegg <tom@rhadamanthys.org>,
       "David S. Miller" <davem@redhat.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Thu, 2003-01-02 at 22:28, Larry McVoy wrote:
> The VM cost hurts.  Badly.  Imagine that the network costs ZERO.  Then
> the map/unmap/vm ops become the dominating term.  That's why it is a
> fruitless approach, it still has a practical limit which is too low.

It depends how predictable your content is. With a 64bit box and a porn
server its probably quite tidy

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