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Date:      Sun, 17 Feb 2002 19:13:50 +0100 (CET)
From:      Roy Sigurd Karlsbakk <roy@karlsbakk.net>
To:        Dag-Erling Smorgrav <des@ofug.org>
Cc:        Thomas Hurst <tom.hurst@clara.net>, <hiten@uk.FreeBSD.org>, <hackers@FreeBSD.ORG>, <freebsd-questions@FreeBSD.ORG>
Subject:   Re: in-kernel HTTP Server for FreeBSD?
Message-ID:  <Pine.LNX.4.30.0202171912170.6408-100000@mustard.heime.net>
In-Reply-To: <xzpzo28dm0f.fsf@flood.ping.uio.no>

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> sendfile() isn't zero-copy, it's just two-less-copies.

zero-copy means "zero copy-operations within memory"

non-zero-copy usually goes
device -> buffer -> user space -> buffer -> device (2 copy operations)
zero-copy
device -> buffer/userspace/shared -> device

--
Roy Sigurd Karlsbakk, MCSE, MCNE, CLS, LCA

Computers are like air conditioners.
They stop working when you open Windows.


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