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Date: Thu, 1 Feb 2001 16:39:32 -0200 (BRDT)
From: Rik van Riel <riel@conectiva.com.br>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
cc: Christoph Hellwig <hch@caldera.de>, "Stephen C. Tweedie" <sct@redhat.com>,
        bsuparna@in.ibm.com, linux-kernel@vger.kernel.org,
        kiobuf-io-devel@lists.sourceforge.net
Subject: Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait
 /notify + callback chains
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On Thu, 1 Feb 2001, Alan Cox wrote:

> > Now one could say: just let the networkers use their own kind of buffers
> > (and that's exactly what is done in the zerocopy patches), but that again leds
> > to inefficient buffer passing and ungeneric IO handling.

	[snip]
> It is quite possible that the right thing to do is to do
> conversions in the cases it happens.

OTOH, somehow a zero-copy system which converts the zero-copy
metadata every time the buffer is handed to another subsystem
just doesn't sound right ...

(well, maybe it _is_, but it looks quite inefficient at first
glance)

regards,

Rik
--
Virtual memory is like a game you can't win;
However, without VM there's truly nothing to lose...

		http://www.surriel.com/
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