答复: 答复: 答复: [PATCH] kdb: Fix the deadlock issue in KDB debugging.

Liuye
2024-03-12T10:05:58Z

>On Tue, Mar 12, 2024 at 08:37:11AM +0000, Liuye wrote:
>> I know that you said schedule_work is not NMI save, which is the first
>> issue. Perhaps it can be fixed using irq_work_queue. But even if
>> irq_work_queue is used to implement it, there will still be a deadlock
>> problem because slave cpu1 still has not released the running queue
>> lock of master CPU0.
>
>This doesn't sound right to me. Why do you think CPU1 won't release the run queue lock?

In this example, CPU1 is waiting for CPU0 to release dbg_slave_lock.