+ Ka-Cheong
On 11/12/20 5:23 AM, Jason Gunthorpe wrote:
On Thu, Nov 12, 2020 at 10:40:30AM +0100, Christoph Hellwig wrote:
ping?
On Fri, Nov 06, 2020 at 07:19:31PM +0100, Christoph Hellwig wrote:
Hi Jason,
this series switches the RDMA core to opencode the special case of
devices bypassing the DMA mapping in the RDMA ULPs. The virt ops
have caused a bit of trouble due to the P2P code node working with
them due to the fact that we'd do two dma mapping iterations for a
single I/O, but also are a bit of layering violation and lead to
more code than necessary.
Tested with nvme-rdma over rxe.
Note that the rds changes are untested, as I could not find any
simple rds test setup.
Changes since v2:
- simplify the INFINIBAND_VIRT_DMA dependencies
- add a ib_uses_virt_dma helper
- use ib_uses_virt_dma in nvmet-rdma to disable p2p for virt_dma devices
- use ib_dma_max_seg_size in umem
- stop using dmapool in rds
Changes since v1:
- disable software RDMA drivers for highmem configs
- update the PCI commit logs
Santosh can you please check the RDA parts??
Hi Ka-Cheong,
Can you please check Christoph change [1] which clean-up
dma-pool API to use ib_dma_* and slab allocator ? This was added
as part of your "net/rds: Use DMA memory pool allocation for rds_header"
commit.
Regards,
Santosh
[1] https://www.spinics.net/lists/linux-pci/msg101547.html
