Make the file larger and read 64k from it instead of 16k
so that it pulls in a full page from the middle of the file.
Merge of master-melb:xfs-cmds:30703a by kenmcd.
Use a large file and 64k I/O size so the test works on 64k page
size machines.
# create file, mmap a region and mmap read it
file=$SCRATCH_MNT/mmap
-xfs_io -f -c "pwrite 0 64k" -c "mmap 16k 16k" -c "mread -r" $file > /dev/null
+xfs_io -f -c "pwrite 0 1024k" -c "mmap 64k 64k" -c "mread -r" $file > /dev/null
rm -f $file