Am Mittwoch, 6. August 2003 08:30 schrieb Petko Manolov:
> On Wed, 6 Aug 2003, Oliver Neukum wrote:
>
> > DMA to a part of a structure is forbidden on the noncoherent architectures.
>
> Didn't quite get this. What "noncoherent" is supposed to mean here? In
> general the memory allocated for a structure which is part of the
> kernel (or kernel module) should be as good as the one allocated by
> kmalloc() with the given flag. Am i missing something here?
Yes, coherency with respect to DMA. Sharing cachelines between data
and buffers may lead to corruption of the transfered data on some
architectures.
Regards
Oliver
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