diff options
| author | Moshe Lazer <moshel@mellanox.com> | 2016-10-27 16:36:42 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2016-11-17 04:03:44 +0300 |
| commit | 6bc1a656ab9f57f0112823b4a36930c9a29d1f89 (patch) | |
| tree | 6e76546703284ab7d3e1a25c389b31511ff930f8 /drivers/infiniband/hw/mlx5/mlx5_ib.h | |
| parent | 16b0e0695a73b68d8ca40288c8f9614ef208917b (diff) | |
| download | linux-6bc1a656ab9f57f0112823b4a36930c9a29d1f89.tar.xz | |
IB/mlx5: Resolve soft lock on massive reg MRs
When calling reg_mr of large MRs (e.g. 4GB) from multiple processes
and MR caches can't supply the required amount of MRs the slow-path
of MR allocation may be used. In this case we need to serialize the
slow-path between the processes to avoid soft lock.
Fixes: e126ba97dba9 ('mlx5: Add driver for Mellanox Connect-IB adapters')
Signed-off-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/mlx5_ib.h')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mlx5_ib.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index dcdcd195fe53..7d689903c87c 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -626,6 +626,8 @@ struct mlx5_ib_dev { struct mlx5_ib_resources devr; struct mlx5_mr_cache cache; struct timer_list delay_timer; + /* Prevents soft lock on massive reg MRs */ + struct mutex slow_path_mutex; int fill_delay; #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING struct ib_odp_caps odp_caps; |