Re: PATCH: Further aacraid work

[Anton Blanchard]

> This would not be such an issue if Linux provided large SG elements
> rather than the fubar descending page order ones they issue today. If
> this could be fixed, I'd not even be interested in the optimization of
> the SG.

Please divert some of your anger towards your manufacturer of dodgy
hardware. Any sane hardware with an IOMMU handles this just fine.
eg on ppc64 running a disk test:

sg size    in        out
1           3      47569
2           0       2591
3           0       1123
4           0        447
5           0        429
...
62       5095          0
64      47061          0

The IOMMU is taking 62-64 entry SG lists and producing 1-5 entry lists.

Anton
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