On Tue, Nov 27, 2012@9:05 AM, Matthew Wilcox [off-list ref] wrote:

Laine, when this occurs, what is the alignment of 'offset' in the sg
entry you're looking at?  If userspace is passing in an unaligned address,
I don't think there's anything we do to try to align it.

I thought this was the case as well, but it appears to be aligned
looking at the request in the user space program (fio using libaio in
this case) before the IO is submitted.

Laine