Re: [Dri-devel] my X-Kernel question

Alan Cox (alan@lxorguk.ukuu.org.uk)
Mon, 22 Oct 2001 09:39:37 +0100 (BST)


> we move the whole driver structure to kernel? Drivers for every other device

Not really.

> STRUCTURE. For a great UI, we need DMA, vsync and devices communicating with
> each other directly or with little overhead. Why insist on doing this in

A video driver has to have extremely good latency, syscalls are overhead that
you generally do not want. There are specific things you want kernel help
with - agp management (and thus AGP DMA), context switching on DRI and maybe
some day interrupt handling for video vsync events and wiring them into
the XSync extension.

The rest is a bit questionable as a kernel space candidate, but if you
want it in kernel go ahead - XFree86 supports both models.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/