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| author |   Yishai Hadas <yishaih@nvidia.com> | 2020-09-30 19:38:26 +0300 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@nvidia.com> | 2020-10-01 16:44:05 -0300 |
| commit | 8bfafde08693cc2e740134c3e32b40254f5d82ae (patch) | |
| tree | a7f58420a3fcb448ce2794c60141e9c0d5565a6e /drivers/infiniband/hw/mlx5/odp.c | |
| parent | IB/core: Improve ODP to use hmm_range_fault() (diff) | |
| download | linux-dev-8bfafde08693cc2e740134c3e32b40254f5d82ae.tar.xz linux-dev-8bfafde08693cc2e740134c3e32b40254f5d82ae.zip | |
IB/core: Enable ODP sync without faulting
Enable ODP sync without faulting, this improves performance by reducing
the number of page faults in the system.
The gain from this option is that the device page table can be aligned
with the presented pages in the CPU page table without causing page
faults.
As of that, the overhead on data path from hardware point of view to
trigger a fault which end-up by calling the driver to bring the pages
will be dropped.
Link: https://lore.kernel.org/r/20200930163828.1336747-3-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/odp.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/odp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c index cca9e85b2ea4..4743ef78afe0 100644 --- a/drivers/infiniband/hw/mlx5/odp.c +++ b/drivers/infiniband/hw/mlx5/odp.c @@ -681,7 +681,7 @@ static int pagefault_real_mr(struct mlx5_ib_mr *mr, struct ib_umem_odp *odp, if (odp->umem.writable && !downgrade) access_mask |= ODP_WRITE_ALLOWED_BIT; - np = ib_umem_odp_map_dma_and_lock(odp, user_va, bcnt, access_mask); + np = ib_umem_odp_map_dma_and_lock(odp, user_va, bcnt, access_mask, true); if (np < 0) return np; |