diff options
| author | Eli Cohen <eli@mellanox.com> | 2016-11-27 16:18:21 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2016-12-13 21:39:47 +0300 |
| commit | afd02cd3a9b6c04b41d946b5d7f6e17b3fc30c6b (patch) | |
| tree | 2086a5c12f6c0302f77b97929dd324046fc25253 /drivers/infiniband/hw | |
| parent | c73b7911de97fad3ab9032a110af48d6ab2da48f (diff) | |
| download | linux-afd02cd3a9b6c04b41d946b5d7f6e17b3fc30c6b.tar.xz | |
IB/mlx5: Avoid system crash when enabling many VFs
When enabling many VFs, the total amount of DMA mappings increase
significantly. This causes DMA allocations to take a lot of time
since they are serialized in the kernel.
As a result the driver enters into fatal condition due to
timeout and the system hangs. To recover from this we disable
MR cache for VFs.
PFs will still have a full cache and VFs cache can be manipulated
as usual after driver load.
Fixes: e126ba97dba9 ('mlx5: Add driver for Mellanox Connect-IB adapters')
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mr.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index 6cbda901f259..5258ac870e6a 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -627,7 +627,8 @@ int mlx5_mr_cache_init(struct mlx5_ib_dev *dev) ent->order = i + 2; ent->dev = dev; - if (dev->mdev->profile->mask & MLX5_PROF_MASK_MR_CACHE) + if ((dev->mdev->profile->mask & MLX5_PROF_MASK_MR_CACHE) && + (mlx5_core_is_pf(dev->mdev))) limit = dev->mdev->profile->mr_cache[i].limit; else limit = 0; |