diff options
| author | Aharon Landau <aharonl@nvidia.com> | 2022-07-26 10:19:08 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2022-07-27 14:45:48 -0300 |
| commit | 86457a92df1bebdcd8e20afa286427e4b525aa08 (patch) | |
| tree | e9ba1f9ea7fe6385d947d98e8ccd6954d8ad035e /drivers/infiniband/hw/mlx5/mlx5_ib.h | |
| parent | 17ae355926ed1832449d52748334b8fa799301f1 (diff) | |
RDMA/mlx5: Replace cache list with Xarray
The Xarray allows us to store the cached mkeys in memory efficient way.
Entries are reserved in the Xarray using xa_cmpxchg before calling to the
upcoming callbacks to avoid allocations in interrupt context. The
xa_cmpxchg can sleep when using GFP_KERNEL, so we call it in a loop to
ensure one reserved entry for each process trying to reserve.
Link: https://lore.kernel.org/r/20220726071911.122765-3-michaelgur@nvidia.com
Signed-off-by: Aharon Landau <aharonl@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/mlx5_ib.h')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mlx5_ib.h | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index 42bc58967b1f..e0eb666aefa1 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -651,8 +651,6 @@ struct mlx5_ib_mr { struct { u32 out[MLX5_ST_SZ_DW(create_mkey_out)]; struct mlx5_async_work cb_work; - /* Cache list element */ - struct list_head list; }; /* Used only by kernel MRs (umem == NULL) */ @@ -744,7 +742,8 @@ struct umr_common { struct mlx5_cache_ent { struct xarray mkeys; - struct list_head head; + unsigned long stored; + unsigned long reserved; char name[4]; u32 order; @@ -756,18 +755,13 @@ struct mlx5_cache_ent { u8 fill_to_high_water:1; /* - * - available_mrs is the length of list head, ie the number of MRs - * available for immediate allocation. - * - total_mrs is available_mrs plus all in use MRs that could be + * - total_mrs is stored mkeys plus all in use MRs that could be * returned to the cache. - * - limit is the low water mark for available_mrs, 2* limit is the + * - limit is the low water mark for stored mkeys, 2* limit is the * upper water mark. - * - pending is the number of MRs currently being created */ u32 total_mrs; - u32 available_mrs; u32 limit; - u32 pending; /* Statistics */ u32 miss; |