Hi Wenzhuo, Beilei, Bernard

I need testpmd app maintainers' comment :
    Do you prefer the simple solution in this patch or Stephen's comprehensive and generic solution(which will modify librte_cmdline, testpmd (and maybe rte_exit()))?
So I can continue resolving the defect.

Thanks!

-----Original Message-----
From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Yu, DapengX
Sent: Friday, December 25, 2020 1:09 PM
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: Lu, Wenzhuo <redacted>; Xing, Beilei <redacted>; Iremonger, Bernard <redacted>; dev@dpdk.org; stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] app/testpmd: avoid exit without resource release

Hi Stephen,

Do you mean this solution?
1. support atexit() in librte_eal, other component can use it to register a function to be called when rte_exit() is called.
2. in librte_cmdline, use atexit() to register a function to release resource 

I am looking forward to more comments from other maintainers, since this solution will modify librte_eal and librte_cmdline, but not just testpmd app.


-----Original Message-----
From: Stephen Hemminger [mailto:stephen@networkplumber.org]
Sent: Friday, December 25, 2020 11:03 AM
To: Yu, DapengX <redacted>
Cc: Lu, Wenzhuo <redacted>; Xing, Beilei <redacted>; Iremonger, Bernard <redacted>; dev@dpdk.org; stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] app/testpmd: avoid exit without resource release

On Thu, 24 Dec 2020 11:57:48 +0800
dapengx.yu@intel.com wrote:

From: YU DAPENG <redacted>

In interactive mode, if testpmd exit by calling rte_exit without 
cmdline resource release, terminal will not echo keyboard input. So 
add code to just show error message, but not exit testpmd when 
unexpected happens on starting packet forwarding in interactive mode. User can type "quit"
to exit testpmd later.

Fixes: 5a8fb55c48ab ("app/testpmd: support unidirectional
configuration")
Cc: stable@dpdk.org

Signed-off-by: YU DAPENG <redacted>

Sounds like a more generic problem with rte_exit and librte_cmdline.
Would it better to fix it in librte_cmdline by adding an atexit() handler.