Great.
> But unfortunately, if the hardware have special alignment restrictions
> (as you mentioned), this patch does not work. I don't know if it makes
> sense to make this configurable and expect customer/user to enable this
> feature if they know about their hardware/driver alignment restrictions.
The only one I know about is the 3ware, but I don't know how many I don't
know about (so to speak). For the kind of win you report, it looks well
worth exploring the compatibility issues and fixing them.
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