From: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
To: Maxime Coquelin <maxime.coquelin@redhat.com>,
dev@dpdk.org, chenbo.xia@intel.com, amorenoz@redhat.com,
david.marchand@redhat.com, ferruh.yigit@intel.com,
michaelba@nvidia.com, viacheslavo@nvidia.com
Cc: stable@dpdk.org, nelio.laranjeiro@6wind.com
Subject: Re: [dpdk-stable] [PATCH 2/3] app/testpmd: fix RSS hash type update
Date: Fri, 10 Sep 2021 12:51:35 +0300 [thread overview]
Message-ID: <e091075a-eac5-3824-3614-bd228401573d@oktetlabs.ru> (raw)
In-Reply-To: <20210910091734.7023-3-maxime.coquelin@redhat.com>
On 9/10/21 12:17 PM, Maxime Coquelin wrote:
> port_rss_hash_key_update() initializes rss_conf with the
> RSS hash type and key provided by the user, but it calls
> rte_eth_dev_rss_hash_conf_get() before calling
> rte_eth_dev_rss_hash_update(), which overides the parsed
> config with current NIC's config.
>
> While the RSS key value is set again after, this is not
> the case of the key length and the type of hash.
>
> There is no need to read the RSS config from the NIC, let's
> just try to set the user defined one.
>
> Fixes: 8205e241b2b0 ("app/testpmd: add missing type to RSS hash commands")
> Cc: stable@dpdk.org
> Cc: nelio.laranjeiro@6wind.com
>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
> app/test-pmd/config.c | 8 ++------
> 1 file changed, 2 insertions(+), 6 deletions(-)
>
> diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
> index 31d8ba1b91..451bda53b1 100644
> --- a/app/test-pmd/config.c
> +++ b/app/test-pmd/config.c
> @@ -2853,18 +2853,14 @@ port_rss_hash_key_update(portid_t port_id, char rss_type[], uint8_t *hash_key,
> int diag;
> unsigned int i;
>
> - rss_conf.rss_key = NULL;
> + rss_conf.rss_key = hash_key;
> rss_conf.rss_key_len = hash_key_len;
> rss_conf.rss_hf = 0;
> for (i = 0; rss_type_table[i].str; i++) {
> if (!strcmp(rss_type_table[i].str, rss_type))
> rss_conf.rss_hf = rss_type_table[i].rss_type;
> }
> - diag = rte_eth_dev_rss_hash_conf_get(port_id, &rss_conf);
> - if (diag == 0) {
> - rss_conf.rss_key = hash_key;
> - diag = rte_eth_dev_rss_hash_update(port_id, &rss_conf);
> - }
> + diag = rte_eth_dev_rss_hash_update(port_id, &rss_conf);
I'm not 100% sure, but I'd say the intent above could be
to update key only as the function name says. I.e. keep
rss_hf as is. That could be the reason to get first.
next prev parent reply other threads:[~2021-09-10 9:51 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-10 9:17 [dpdk-stable] [PATCH 0/3] Virtio PMD RSS support & RSS fixes Maxime Coquelin
2021-09-10 9:17 ` [dpdk-stable] [PATCH 1/3] net/virtio: add initial RSS support Maxime Coquelin
2021-09-10 10:06 ` Andrew Rybchenko
2021-09-10 11:44 ` Maxime Coquelin
2021-09-10 12:58 ` Andrew Rybchenko
2021-09-10 13:10 ` Maxime Coquelin
2021-09-10 9:17 ` [dpdk-stable] [PATCH 2/3] app/testpmd: fix RSS hash type update Maxime Coquelin
2021-09-10 9:51 ` Andrew Rybchenko [this message]
2021-09-10 9:57 ` Maxime Coquelin
2021-09-10 10:06 ` Andrew Rybchenko
2021-09-10 14:16 ` Nélio Laranjeiro
2021-09-13 9:41 ` Maxime Coquelin
2021-09-14 7:20 ` Nélio Laranjeiro
2021-09-16 3:03 ` Li, Xiaoyun
2021-09-16 7:33 ` Maxime Coquelin
2021-09-16 7:41 ` Li, Xiaoyun
2021-09-16 8:08 ` Maxime Coquelin
2021-09-16 8:30 ` Li, Xiaoyun
2021-09-10 9:17 ` [dpdk-stable] [PATCH 3/3] net/mlx5: Fix RSS RETA update Maxime Coquelin
2021-09-21 9:55 ` Slava Ovsiienko
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