diff options
author | Davidlohr Bueso <dave@stgolabs.net> | 2017-09-08 16:15:08 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-08 18:26:49 -0700 |
commit | f808c13fd3738948e10196496959871130612b61 (patch) | |
tree | 0f9b1bf3ccc9c4d051bf4fed87b493dced56d032 /drivers/infiniband/core/uverbs_cmd.c | |
parent | 09663c86e24953556ff8696efa023557901f2b66 (diff) |
lib/interval_tree: fast overlap detection
Allow interval trees to quickly check for overlaps to avoid unnecesary
tree lookups in interval_tree_iter_first().
As of this patch, all interval tree flavors will require using a
'rb_root_cached' such that we can have the leftmost node easily
available. While most users will make use of this feature, those with
special functions (in addition to the generic insert, delete, search
calls) will avoid using the cached option as they can do funky things
with insertions -- for example, vma_interval_tree_insert_after().
[jglisse@redhat.com: fix deadlock from typo vm_lock_anon_vma()]
Link: http://lkml.kernel.org/r/20170808225719.20723-1-jglisse@redhat.com
Link: http://lkml.kernel.org/r/20170719014603.19029-12-dave@stgolabs.net
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Doug Ledford <dledford@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Christian Benvenuti <benve@cisco.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/infiniband/core/uverbs_cmd.c')
-rw-r--r-- | drivers/infiniband/core/uverbs_cmd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index e0cb99860934..4ab30d832ac5 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -118,7 +118,7 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file, ucontext->closing = 0; #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING - ucontext->umem_tree = RB_ROOT; + ucontext->umem_tree = RB_ROOT_CACHED; init_rwsem(&ucontext->umem_rwsem); ucontext->odp_mrs_count = 0; INIT_LIST_HEAD(&ucontext->no_private_counters); |