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RDMA/odp: use mmu_notifier_get/put for 'struct ib_ucontext_per_mm'

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This is a significant simplification, no extra list is kept per FD, and
the interval tree is now shared between all the ucontexts, reducing
overhead if there are multiple ucontexts active.

Link: https://lore.kernel.org/r/20190806231548.25242-7-jgg@ziepe.ca
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Jason Gunthorpe
2019-08-06 20:15:43 -03:00
parent daa138a58c
commit c571feca2d
6 changed files with 55 additions and 135 deletions
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5
drivers/infiniband/hw/mlx5/main.c
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@@ -1995,11 +1995,6 @@ static void mlx5_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
struct mlx5_ib_dev *dev = to_mdev(ibcontext->device);
struct mlx5_bfreg_info *bfregi;
/* All umem's must be destroyed before destroying the ucontext. */
mutex_lock(&ibcontext->per_mm_list_lock);
WARN_ON(!list_empty(&ibcontext->per_mm_list));
mutex_unlock(&ibcontext->per_mm_list_lock);
bfregi = &context->bfregi;
mlx5_ib_dealloc_transport_domain(dev, context->tdn, context->devx_uid);