Hi,

I am using DPDK-18.02.02 in my application where we have created hash table
with the following parameters,

/*DPDK hash table configuration parameters */
rte_hash_parameters flowHashParams = {
    .name = "Hash Table for FLOW",
    .entries = 128000,
    .key_len = sizeof(ipv4_flow_key_t),  /* Key size - number of bytes */
    .hash_func = ipv4_flow_hash_crc,     /* Function which creates the Key */
    .hash_func_init_val = 0,
    .extra_flag = RTE_HASH_EXTRA_FLAGS_MULTI_WRITER_ADD,
    /* FLAG - Multiple thread can use this HT */
};

While adding and deleting an entry in hash table in DPDK-18.02.2, everything works well.

While moving on with DPDK-19.11.13(latest stable version), we are facing a crash at rte_hash_del_key(). If we remove that extra_flag,  RTE_HASH_EXTRA_FLAGS_MULTI_WRITER_ADD in the hash table parameters, we did not face any crash at rte_hash_del_key().

In my application, one thread adds entry to the hash table, another one thread reads those information and delete the entry in the hash table. 

How can we add that multiwriter support for the hash table? Is there any alternative to enable that support?

Thanks,
Gokilavani A