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Issue description

The two statements "By default, the system uses swap spaces in series, meaning that the kernel uses the first activated swap space until it is full, and then it starts using the second swap space. " and "When swap spaces have the same priority, the kernel writes to them in a round-robin fashion." seem to be contradictive. The man 2 swapon page explains better, that there are two priority areas and specifying a priority places a swap device in a high priority area and only round-robin only applies to high priority swap devices.

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