Since this wait queue is used sparsely, a smaller wait queue implementation using hash queues to find the correct wait queue has been implemented in the rmap patch.

因为这个等待队列极少用到，所以在 rmap 补丁中实现了一个更小的队列，通过哈希队列来找到正确的等待队列。

youdao

Pointers into the kernel's wait queue.

指针到内核的等待队列。

youdao

However, it is not always convenient to wake up all sleeping processes in a wait queue.

然而，要唤醒等待队列中所有睡眠的进程有时并不方便。

youdao

Then you have to get back into the queue and wait again.

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The longer you wait at the back of the queue the greater the opportunity for the stock to run away and result in your getting a worse price.

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Research by Richard Hamblin and others at the King's Fund, a medical charity, has found that, despite the lengthening queue, the average wait has remained at 13-14 weeks since the 1960s.

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