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Re: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1

To: mingo@xxxxxxx
Subject: Re: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1
From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Date: Tue, 9 Jan 2001 14:51:28 +0000 (GMT)
Cc: sct@xxxxxxxxxx (Stephen C. Tweedie), riel@xxxxxxxxxxxxxxxx (Rik van Riel), davem@xxxxxxxxxx (David S. Miller), hch@xxxxxxxxxx, netdev@xxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <Pine.LNX.4.30.0101091532150.4368-100000@e2> from "Ingo Molnar" at Jan 09, 2001 03:40:56 PM
Sender: owner-netdev@xxxxxxxxxxx
> designing for them. Eg. if an IO operation (eg. streaming video webcast)
> does a DMA from a camera card to an outgoing networking card, would it be

Most mpeg2 hardware isnt set up for that kind of use. And webcast protocols 
like h.263 tend to be software implemented. 

Capturing raw video for pre-processing is similar. Right now thats best
done with mmap() on the ring buffer and O_DIRECT I/O it seems

Alan


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