Hello, all.
Mark Lord wrote:
Jens Axboe wrote:
..
Seems to me that your reasoning is correct. It's a fact that the
original block mapped sg lists satisfies all requirements of the device
driver and/or hardware, otherwise would be a bug. The iommu may go nuts
of course, but logically that new sg list should be choppable into the
same requirements.
I just finished going through all of the arch implementations and,
as near as I can tell, they only ever *merge* sg list items,
and never create additional sg entries.
One question though. Do IOMMU's preserve alignment? ie. Do they align
33k block on 64k boundary? I guess they do, just wanna make sure.
--
tejun
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