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IB/mlx5: Fix long EEH recover time with NVMe offloads 

On NVMe offloads connection with many IO queues, EEH takes long time to
recover. The culprit is the synchronize_srcu in the destroy_mkey. The
solution is to use synchronize_srcu only for ODP mkey.

Fixes: b4cfe447d4 ("IB/mlx5: Implement on demand paging by adding support for MMU notifiers")
Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Huy Nguyen 2018-12-18 14:15:56 +02:00 committed by Jason Gunthorpe
parent 842a9c837e
commit bb7e22a8ab
1 changed files with 16 additions and 3 deletions
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13
drivers/infiniband/hw/mlx5/mr.c
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@ -73,6 +73,7 @@ static int destroy_mkey(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
/* Wait until all page fault handlers using the mr complete. */
if (mr->umem && mr->umem->is_odp)
synchronize_srcu(&dev->mr_srcu);
#endif
@ -237,6 +238,9 @@ static void remove_keys(struct mlx5_ib_dev *dev, int c, int num)
{
struct mlx5_mr_cache *cache = &dev->cache;
struct mlx5_cache_ent *ent = &cache->ent[c];
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
bool odp_mkey_exist = false;
#endif
struct mlx5_ib_mr *tmp_mr;
struct mlx5_ib_mr *mr;
LIST_HEAD(del_list);
@ -249,6 +253,10 @@ static void remove_keys(struct mlx5_ib_dev *dev, int c, int num)
break;
}
mr = list_first_entry(&ent->head, struct mlx5_ib_mr, list);
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
if (mr->umem && mr->umem->is_odp)
odp_mkey_exist = true;
#endif
list_move(&mr->list, &del_list);
ent->cur--;
ent->size--;
@ -257,6 +265,7 @@ static void remove_keys(struct mlx5_ib_dev *dev, int c, int num)
}
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
if (odp_mkey_exist)
synchronize_srcu(&dev->mr_srcu);
#endif
@ -572,6 +581,7 @@ static void clean_keys(struct mlx5_ib_dev *dev, int c)
{
struct mlx5_mr_cache *cache = &dev->cache;
struct mlx5_cache_ent *ent = &cache->ent[c];
bool odp_mkey_exist = false;
struct mlx5_ib_mr *tmp_mr;
struct mlx5_ib_mr *mr;
LIST_HEAD(del_list);
@ -584,6 +594,8 @@ static void clean_keys(struct mlx5_ib_dev *dev, int c)
break;
}
mr = list_first_entry(&ent->head, struct mlx5_ib_mr, list);
if (mr->umem && mr->umem->is_odp)
odp_mkey_exist = true;
list_move(&mr->list, &del_list);
ent->cur--;
ent->size--;
@ -592,6 +604,7 @@ static void clean_keys(struct mlx5_ib_dev *dev, int c)
}
#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
if (odp_mkey_exist)
synchronize_srcu(&dev->mr_srcu);
#endif