Compensate when Pinned

[Ron Pressler]

Sorry, this message was stuck in the mailing-list's queue. This matter has been addressed.

> On 28 Oct 2021, at 04:00, emoryzheng(郑淼) <emoryzheng at tencent.com> wrote:
> 
> Hello,
> We have a test case about Loom, it can pass before;
> The test case can be seen on attach file;
> 
> But it cannot pass after this patch:
> ```
> commit de90a43c7a5f0b28bd0af9271de210475808ca0c
> Author: Alan Bateman <alan.bateman at oracle.com>
> Date:   Wed Sep 1 09:22:23 2021 +0100
> 
>    Replace lock/condition objects to simplify pinned park
> ```
> 
> Actually, this modify cause the test fail, because getCondition.await() will call tryCompensate() of ForkJoinPool eventually:
> +    private void parkOnCarrierThread(long nanos) {
> ···
> -                if (!parkPermit) {
> -                    // wait to be signalled or interrupted
> -                    getCondition().await();
> ···
> +            if (!parkPermit) {
> +                U.park(false, nanos);
>             }
> 
> If there are 4 ForkJoinWorkerThread, and they are all pinned, how to make vt work correct?
> 
> Thanks，
> 
> Miao