QA output created by 171
WARNING: --leafsize is deprecated, use --nodesize
WARNING: the filesystem may not be mountable, sectorsize 4096 doesn't match page size 65536
Format and mount
Reformat with appropriate size
Create a big file and reflink it
Allocate the rest of the space
CoW the big file
pwrite: No space left on device
Remount and try CoW again
pwrite: No space left on device