On Wed, Apr 3, 2019 at 1:23 AM Shiraz Saleem <shiraz.saleem@xxxxxxxxx> wrote: > > Combine contiguous regions of PAGE_SIZE pages > into single scatter list entries while adding > to the scatter table. This minimizes the number > of the entries in the scatter list and reduces > the DMA mapping overhead, particularly with the > IOMMU. > > Set default max_seg_size in core for IB devices > to 2G and do not combine if we exceed this limit. > > Also, purge npages in struct ib_umem as we now > DMA map the umem SGL with sg_nents, and update > remaining non ODP drivers that use umem->npages. > Move npages tracking to ib_umem_odp as ODP drivers > still need it. > > This patch should be applied post > https://patchwork.kernel.org/cover/10857607/ > > Suggested-by: Jason Gunthorpe <jgg@xxxxxxxx> > Reviewed-by: Michael J. Ruhl <michael.j.ruhl@xxxxxxxxx> > Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx> > Acked-by: Adit Ranadive <aditr@xxxxxxxxxx> > Signed-off-by: Shiraz Saleem <shiraz.saleem@xxxxxxxxx> Tested-by: Selvin Xavier <selvin.xavier@xxxxxxxxxxxx>
