On Sun, Jan 23, 2011 at 9:35 PM, Emil Langrock <emil.langrock@xxxxxx> wrote: > there is support for ext4 to use the trim ATA command when a block is freed. I > read that there should be an extra command which does that freeing afterwards. > So is it possible to use that information inside the qcow to mark those > sectors as free? This would make it possible to shrink the size of an image > significantly using some offline (maybe also some online) tools. There is currently no TRIM support in qcow2. Christoph Hellwig recently added TRIM support to raw images on an XFS host file system. In the future we'll see wider support. Stefan -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
