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net/mlx5: DR, Free unused buddy ICM memory

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Track buddy's used ICM memory, and free it if all
of the buddy's memory bacame unused.
Do this only for STEs.
MODIFY_ACTION buddies are much smaller, so in case there
is a large amount of modify_header actions, which result
in large amount of MODIFY_ACTION buddies, doing this
cleanup during sync will result in performance hit while
not freeing significant amount of memory.

Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Reviewed-by: Alex Vesker <valex@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Yevgeny Kliteynik 2020-09-14 15:07:59 +03:00 committed by Saeed Mahameed
parent 1c58651412
commit 284836d966
2 changed files with 11 additions and 4 deletions
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14
drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c
View File

@ -175,10 +175,12 @@ get_chunk_icm_type(struct mlx5dr_icm_chunk *chunk)
return chunk->buddy_mem->pool->icm_type;
}
static void dr_icm_chunk_destroy(struct mlx5dr_icm_chunk *chunk)
static void dr_icm_chunk_destroy(struct mlx5dr_icm_chunk *chunk,
struct mlx5dr_icm_buddy_mem *buddy)
{
enum mlx5dr_icm_type icm_type = get_chunk_icm_type(chunk);
buddy->used_memory -= chunk->byte_size;
list_del(&chunk->chunk_list);
if (icm_type == DR_ICM_TYPE_STE)
@ -223,10 +225,10 @@ static void dr_icm_buddy_destroy(struct mlx5dr_icm_buddy_mem *buddy)
struct mlx5dr_icm_chunk *chunk, *next;
list_for_each_entry_safe(chunk, next, &buddy->hot_list, chunk_list)
dr_icm_chunk_destroy(chunk);
dr_icm_chunk_destroy(chunk, buddy);
list_for_each_entry_safe(chunk, next, &buddy->used_list, chunk_list)
dr_icm_chunk_destroy(chunk);
dr_icm_chunk_destroy(chunk, buddy);
dr_icm_pool_mr_destroy(buddy->icm_mr);
@ -267,6 +269,7 @@ dr_icm_chunk_create(struct mlx5dr_icm_pool *pool,
goto out_free_chunk;
}
buddy_mem_pool->used_memory += chunk->byte_size;
chunk->buddy_mem = buddy_mem_pool;
INIT_LIST_HEAD(&chunk->chunk_list);
@ -306,8 +309,11 @@ static int dr_icm_pool_sync_all_buddy_pools(struct mlx5dr_icm_pool *pool)
mlx5dr_buddy_free_mem(buddy, chunk->seg,
ilog2(chunk->num_of_entries));
pool->hot_memory_size -= chunk->byte_size;
dr_icm_chunk_destroy(chunk);
dr_icm_chunk_destroy(chunk, buddy);
}
if (!buddy->used_memory && pool->icm_type == DR_ICM_TYPE_STE)
dr_icm_buddy_destroy(buddy);
}
return 0;

1
drivers/net/ethernet/mellanox/mlx5/core/steering/mlx5dr.h
View File

@ -141,6 +141,7 @@ struct mlx5dr_icm_buddy_mem {
/* This is the list of used chunks. HW may be accessing this memory */
struct list_head used_list;
u64 used_memory;
/* Hardware may be accessing this memory but at some future,
* undetermined time, it might cease to do so.