Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait /notify + callback chains

From: Stephen C. Tweedie (
Date: Mon Feb 05 2001 - 12:20:42 EST


On Mon, Feb 05, 2001 at 03:19:09PM +0000, Alan Cox wrote:
> > Yes, it's the sort of thing that you would hope should work, but in
> > practice it's not reliable.
> So the less smart devices need to call something like
> kiovec_align(kiovec, 512);
> and have it do the bounce buffers ?

_All_ drivers would have to do that in the degenerate case, because
none of our drivers can deal with a dma boundary in the middle of a
sector, and even in those places where the hardware supports it in
theory, you are still often limited to word-alignment.


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