On 2021-08-21 16:04:01 [+0900], Jeaho Hwang wrote:

2021년 8월 21일 (토) 오후 2:05, Peter Chen [off-list ref]님이 작성:

quoted

HI Peter.

We configured the kernel as "low latency desktop" and added
"threadirqs" inside the cmdline parameter.
Then udc irq handler runs as a thread and shows no suspicious working.
I Hope It will help.

May I again point out that since commit
   81e2073c175b8 ("genirq: Disable interrupts for force threaded handlers")                                                                                         

the threaded handler runs with disabled interrupts. This time more
verbose. It is available since v5.12-rc4 but it has been also applied
for stable.

Thanks.

Sebastian