On Mon, 2007-11-19 at 16:46 -0800, David Miller wrote:
>
> 1) Require that entire buffers are commited by call sites,
> and thus "embedding" DMA'd within non-DMA stuff isn't allowed
>
> 2) Add the __dma_cacheline_aligned tag.
>
> But note that with #2 it could get quite ugly because the
> alignment and size both have a minimum that needs to be
> enforced, not just the alignment alone. So either:
Yup.
> struct foo {
> unsigned int other_unrelated_stuff;
>
> struct object dma_thing __dma_cacheline_aligned;
>
> unsigned int more_nondma_stuff __dma_cacheline_aligned;
> };
In my tests, I had used a "fuckton_t" object defined to be an empty
thing with alignment constraint, seemed to work :-) But I'd rather
require #1.
BTW. What is the status nowadays with skb's ?
Cheers,
Ben.
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