This works by making sure that the allocation of paging space is delayed until the time that it is necessary to page out the page, which ensures that there is no wasted paging space.

这确保将分页空间的分配延迟到必须调出页面的时候，从而确保不会浪费分页空间。

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"When people are stuck on a delayed train, they have time and can whip out their phone to take photos and video of any overcrowded services they're on and complain publicly, " he said.

BBC: London Midland: Train drivers' union blames pay levels

If I get delayed at the metal detector, the laptop won't be sitting out in the open for a long time.

WSJ: Tips to Take the Hassle Out of Travel