Re: [Q] How can I transfer data from hard disk to PCI device's memory

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Thu Aug 07 2003 - 07:05:47 EST

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On Iau, 2003-08-07 at 06:45, Cho, joon-woo wrote:
> Hello.
>
> I want to transfer data 'directly' from hard disk to some PCI device which
> has memory
>
> with the helpf of kernel(file system, device driver).

The kernel doesn;t currently support this. The O_DIRECT I/O handling
needs to know about stuff like page reference counts that PCI space
doesn't have lots of older (and some current) hardware has real problems
with PCI PCI transfers.

So its a non trivial project, although doable

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Next message: Stuart Longland: "Problems with Yamaha opl3sa2 under 2.4.20 and ongoing PCMCIA & USB problems on 2.6.0-test2"
Previous message: Oliver Pitzeier: "grsec chroot; deny raw access (WAS: RE: chroot() breaks syslog() ?)"
In reply to: Cho, joon-woo: "[Q] How can I transfer data from hard disk to PCI device's memory"
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