Re: [dpdk-dev] [PATCH 2/3] app/testpmd: remove forwarding config from parsing Rx and Tx

[oulijun <oulijun@huawei.com>]

在 2021/3/5 11:21, Li, Xiaoyun 写道:
> Hi
> 
>> -----Original Message-----
>> From: dev <dev-bounces@dpdk.org> On Behalf Of Lijun Ou
>> Sent: Friday, March 5, 2021 08:56
>> To: Yigit, Ferruh <ferruh.yigit@intel.com>
>> Cc: dev@dpdk.org; linuxarm@openeuler.org
>> Subject: [dpdk-dev] [PATCH 2/3] app/testpmd: remove forwarding config from
>> parsing Rx and Tx
>>
>> From: Huisong Li <lihuisong@huawei.com>
>>
>> The "fwd_config_setup()" function does release and apply for memory of
>> forwarding flows, and re-establish these flows when rxq/txq or rxd/txd is
>> changed. The function is also called by "start_packet_forwarding()" when user
>> executes "start" cmd.
>> All changes for rxq/txq or rxd/txd can be updated uniformly when this command
>> is executed. Therefore, it is a little redundant in the "cmd_config_rx_tx_parsed"
>> function.
>>
>> In addition, the forwarding flows under one TC is configured based on number
>> of queues allocated to TC. And number of queues allocated to TC is updated
>> after calling  "rte_eth_dev_configure"
>> again. If the number of queues is reduced after configuring the DCB, and then,
>> release and apply for flow memory, and reinitialize the forwarding flows under
>> the DCB mode based on the old TC information. As a result, null pointer may be
>> accessed.
> 
> The patch looks good to me. But in commit log, you mean forwarding streams, right? Flows will confuse to mean rte_flow.
Yes. it is forwarding streams.
> 
>>
>> Like:
>> set nbcore 4
>> port stop all
>> port config 0 dcb vt off 4 pfc on
>> port start all
>> port stop all
>> port config all rxq 8
>> port config all txq 8
>>
>> At the moment, a segmentation fault occurs.
>>
>> Fixes: ce8d561418d4 ("app/testpmd: add port configuration settings")
>> Cc: stable@dpdk.org
>>
>> Signed-off-by: Huisong Li <lihuisong@huawei.com>
>> Signed-off-by: Lijun Ou <oulijun@huawei.com>
>> ---
>>   app/test-pmd/cmdline.c | 2 --
>>   1 file changed, 2 deletions(-)
>>
>> diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c index
>> 832ae70..8b0f7d5 100644
>> --- a/app/test-pmd/cmdline.c
>> +++ b/app/test-pmd/cmdline.c
>> @@ -1837,8 +1837,6 @@ cmd_config_rx_tx_parsed(void *parsed_result,
>>   		return;
>>   	}
>>
>> -	fwd_config_setup();
>> -
>>   	init_port_config();
>>
>>   	cmd_reconfig_device_queue(RTE_PORT_ALL, 1, 1);
>> --
>> 2.7.4
> 
> .
>