On 11/13/20 9:35 PM, Tim via users wrote:
On Fri, 2020-11-13 at 13:16 -0500, Jonathan Billings wrote:
     In principle the location of a swap file’s header may be
     determined with the help of appropriate filesystem
     driver. Unfortunately, however, it requires the filesystem holding
     the swap file to be mounted, and if this filesystem is journaled,
     it cannot be mounted during resume from disk. For this reason to
     identify a swap file swsusp uses the name of the partition that
     holds the file and the offset from the beginning of the partition
     at which the swap file’s header is located. For convenience, this
     offset is expressed in <PAGE_SIZE> units.

Surely the absolute position of any file in a file system couldn't be
relied upon to always be the same?

Of course it can.  How is it going to move around?
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