Re: [PATCH] IB/isert: fix unaligned immediate-data handling

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On Mon, Aug 31, 2020 at 5:18 AM Jason Gunthorpe <jgg@xxxxxxxx> wrote:
>
> On Sun, Aug 30, 2020 at 03:32:09AM -0700, Sagi Grimberg wrote:
> > Currently we allocate rx buffers in a single contiguous buffers
> > for headers (iser and iscsi) and data trailer. This means
> > that most likely the data starting offset is aligned to 76
> > bytes (size of both headers).
> >
> > This worked fine for years, but at some point this broke.
> > To fix this, we should avoid passing unaligned buffers for
> > I/O.
>
> That is a bit vauge - what suddenly broke it?

I will try some regression testing to see when it broke.  As this is
RDMA, it takes real hardware and the build/reboot cycle takes a lot
longer.  I should be able to get to this in the middle of the week.

If anyone has a guess of what version to "look around", please let me know.

Doug

>
> Jason



-- 
Doug Dumitru
EasyCo LLC



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