On Wed, Jun 05, 2019 at 05:22:35PM -0300, Jason Gunthorpe wrote: > On Wed, Jun 05, 2019 at 09:08:31PM +0200, Christoph Hellwig wrote: > > This ensures all proper DMA layer handling is taken care of by the > > SCSI midlayer. > > Maybe not entirely related to this series, but it looks like the SCSI > layer is changing the device global dma_set_max_seg_size() - at least > in RDMA the dma device is being shared between many users, so we > really don't want SCSI to make this value smaller. > > Can we do something about this? We could do something about it as outlined in my mail - pass the dma_params explicitly to the dma_map_sg call. But that isn't really suitable for a short term fix and will take a little more time. Until we've sorted that out the device paramter needs to be set to the smallest value supported.
