On Tue, May 31, 2016 at 10:43:36AM +0800, 陈宗志 wrote: > I have fint the way to change the extent size hint > mkfs.xfs -r extsize=40960 /dev/sda1 Ah, no, that isn't the extsize I'm refering to. That's for realtime device configuration at mkfs, not a per-inode extent size hint. When you create the image file do this: $ xfs_io -f -c "extsize 1m" /path/to/new/vm_image $ qemu-image create -f qcow2 /path/to/new/vm_image 10g $ xfs_io -c extsize /path/to/new/vm_image [1048576] /path/to/new/vm_image $ And now the qcow2 image file will have extents allocated in multiples of 1MB. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
