Re: using swap files - where do I activate at boot?
Brian Servis said:
> It will get added to the swap at boot with the rest of the swap space. I
> would recommend giving your swap partitions/files different priorities
> in this case so that the faster partitions are higher priority and the
> swap files are lower priority. See swapon(2) for more details.
>
> /dev/of/swap/partition none sw,pri=1
> /path/to/swapfile none sw,pri=0
The behaviour I've observed is that if no swap priorities are specified,
they'll be done sequentially, with the first listed swap fs being given a
priority of -1, the second is assigned -2, etc.
Previous suggestions I've seen were that you should manually override the
priorities to make them equal, in which case the kernel will give each page
to the swap fs that it expects to get the fastest response from. Other
reading suggests that with equal priority, pages are assigned round-robin.
What really happens and what's the best way to handle swap priorities when
dealing with swap devices of comparable performance (e.g., swap partitions on
two different hard drives)?
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