Thank you so much for kindly explaining the problem!
as Wonhyuk Yang and Max Filippov said, I didn't consider the case that
interrupt handler holds same lock.
there can be deadlock as you said.
2021년 4월 23일 (금) 오후 3:45, Max Filippov 님이 작성:
>
> On Thu, Apr 22, 2021 at 11:28 PM Wonhyuk Yang
On Thu, Apr 22, 2021 at 11:28 PM Wonhyuk Yang wrote:
> > I think the main idea spinlock disables preemption is,
>
> > the other process that's spinning on the lock can acquire lock.
>
> > but in some implementations of spinlock, like qspinlock in x86 (or mcs
> > lock),
> > I think there's no
Hi,
> I think the main idea spinlock disables preemption is,
> the other process that's spinning on the lock can acquire lock.
> but in some implementations of spinlock, like qspinlock in x86 (or mcs
lock),
> I think there's no need to disable preemption. because processes
> waiting for lock
