Swap_pager messages when no swap is in use

[bob prohaska]

While running svnlite to update sources on a Pi3 running -currrent
I was surprised to notice a flurry of 
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 133095, size: 4096
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 136056, size: 4096
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 140560, size: 4096
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 134290, size: 8192
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 124869, size: 16384
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 125113, size: 4096
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 142799, size: 4096
messages when no swap seemed to be in use. Gstat reported much congestion
of the microSD card, holding / and half the swap, but there was no obvious
activity reading or writing swap, just the root partition.

Should this be considered normal? It strikes me as very odd.

Thanks for reading,

bob prohaska