This is an expensive operation because every live object might be moved, and every pointer to a moved object must be updated to the new location.

这是一项昂贵的操作，因为可能会移动每个活动对象，每个经过移动的对象的指针都必须更新为新位置。

youdao

Rather than wait for the other thread to finish, the current thread can "help" it out by finishing the operation for it by moving the tail pointer forward (b).

不必等候其他线程完成，当前线程就可以“帮助”它完成操作，把尾指针向前移动(B)。

youdao

You use the access_ok macro to validate a user-space pointer for a given operation.

您可以使用 access_ok 宏来验证给定操作的用户空间指针。

youdao