RE: [PATCH v2] ACPI: APEI: do not add task_work to kernel thread to avoid memory leak

[Luck, Tony]

Thanks for your patient explanations.

> STEP2: In IRQ context, ghes_proc_in_irq() queues memory failure work on current CPU
> in workqueue and add task work to sync with the workqueue.

Why is there a difference if the interrupted task was a user task vs. a kernel thread?

It seems arbitrary. If the error can be handled in the kernel thread case without
a task_work_add() to the current process, can't all errors be handled this way?

The current thread likely has nothing to do with the error. Just a matter of chance
on what is running when the NMI is delivered, right?

-Tony