diff options
| author | Jason Gunthorpe <jgg@mellanox.com> | 2018-09-16 20:48:08 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2018-09-21 18:58:36 +0300 |
| commit | f27a0d50a4bc2861b472c2e3740d63a29d1ac460 (patch) | |
| tree | 6119d5f05050d54525288a17e26f13f6475fe175 /drivers/infiniband/core/uverbs_cmd.c | |
| parent | c9990ab39b6e911003bab10a6da96e98ab1503a3 (diff) | |
| download | linux-f27a0d50a4bc2861b472c2e3740d63a29d1ac460.tar.xz | |
RDMA/umem: Use umem->owning_mm inside ODP
Since ODP had a single struct mmu_notifier located in the ucontext it
could only handle a single MM at a time, and this prevented it from using
the new owning_mm system.
With the prior rework it is now simple to let ODP track multiple MMs per
ucontext, finish the job so that the per_mm is allocated on a mm by mm
basis, and freed when the last umem is dropped from the ucontext.
As a side effect the new saner locking removes the lockdep splat about
nesting the umem_rwsem between mmu_notifier_unregister and
ib_umem_odp_release.
It also makes ODP work with multiple processes, across, fork, etc.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/core/uverbs_cmd.c')
| -rw-r--r-- | drivers/infiniband/core/uverbs_cmd.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index ce678e1008a4..d77b0b9793c7 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -124,12 +124,8 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file, ucontext->cleanup_retryable = false; #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING - ucontext->per_mm.umem_tree = RB_ROOT_CACHED; - init_rwsem(&ucontext->per_mm.umem_rwsem); - ucontext->per_mm.odp_mrs_count = 0; - INIT_LIST_HEAD(&ucontext->per_mm.no_private_counters); - ucontext->per_mm.context = ucontext; - + mutex_init(&ucontext->per_mm_list_lock); + INIT_LIST_HEAD(&ucontext->per_mm_list); if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING)) ucontext->invalidate_range = NULL; |