BTRFS doesn't support swap files

[jonchampagne]

So according to the BTRFS wiki and my own testing, BTRFS foesn't support having swap files upon it. This isn't indicated in the web UI, and as such confused me as to why the file was failing to be used with no clear error output. Considering on unraid 6.2 at least the default filesystem for the cache disk is BTRFS, it would be nice if there were a check in the plugin to make sure the swap file isn't on a BTRFS filesystem.

[jmalfara]

Yup I agree.

Im going to leave my log here for some hopeful Googler to find incase they have the same issue.

Oct 28 23:18:46 Tower rc.swapfile[5637]: Swap file /mnt/cache/swapfile created and started
Oct 28 23:18:51 Tower emhttpd: cmd: /usr/local/emhttp/plugins/swapfile/scripts/rc.swapfile start
Oct 28 23:18:51 Tower kernel: swapon: swapfile has holes
Oct 28 23:18:51 Tower rc.swapfile[5670]: Swap file /mnt/cache/swapfile re-used and started