Re: User mode Virt -> Phys

Jamie Lokier (lkd@tantalophile.demon.co.uk)
Wed, 13 Jan 1999 12:53:37 +0000

On Tue, Jan 12, 1999 at 05:23:21PM +0000, Alan Cox wrote:
> You still don't need to do that translation for user space. Have a look
> at Stephen Tweedie <sct@redhat.com>'s raw-io patches and DMA hooks in
> kernel space for handling this stuff

Yes, that sounds interesting and I will look at it as soon as I can.
Though I suspect the I/O setup for page locking/unlocking/translation
will be too slow if it has to be done for each read/write operation.

My approach is for when you want to set these things up in advance, then
use them repeatedly.

-- Jamie

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