Messages in this thread | | | Date | Mon, 5 Feb 2001 17:20:42 +0000 | From | "Stephen C. Tweedie" <> | Subject | Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait /notify + callback chains |
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Hi,
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.
--Stephen
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