Re: [Linux-3D] Try my new DMA kernel functions
Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 9 Jun 1998 21:57:55 +0100 (BST)
> > I care about - firstly mmap /dev/mem, start video grabbing on it, secondly
> > grabbing into the image part of a sys5 shared memory MITSHM block.
>
> sys5 shared memory is stupid and obsolete. It's good to have the
> facility around so that stupid and obsolete programs still work, but
> when considering radical new OS features, we shouldn't design them
> around ancient quirks that no wise programmer will use in new code.
Stupid, obsolete humm - video folks do DMA to MITSHM X objects because its
FAST, way faster than the alternatives generally available. I doubt they
generally give a hoot about SYS5 v BSD shm arguments at all.
Alan
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