Re: [PATCH 08/13] IB/iser: set virt_boundary_mask in the scsi host

[Christoph Hellwig]

On Thu, Jun 06, 2019 at 09:59:35AM -0300, Jason Gunthorpe wrote:
> > Until we've sorted that out the device paramter needs to be set to
> > the smallest value supported.
> 
> smallest? largest? We've been setting it to the largest value the
> device can handle (ie 2G)

Well, in general we need the smallest value supported by any ULP,
because if any ULP can't support a larger segment size, we must not
allow the IOMMU to merge it to that size.  That being said I can't
really see why any RDMA ULP should limit the size given how the MRs
work.