Am 04.03.2013 um 15:02 hat Stefan Hajnoczi geschrieben: > Users have reported that qcow2 internal snapshot creation is slow. I filed a > bug report at https://bugs.launchpad.net/qemu/+bug/1126369. > > This patch series reduces the time for qcow2 internal snapshot creation > significantly, from more than 3 minutes to under 1 second. > > In the process of removing unnecessary cache flushes, I also stumbled upon > instances of bdrv_flush(bs->file) where we really want to flush metadata > updates. Since qcow2 caches metadata this actually does not write out the > metadata updates to disk! The fix is either bdrv_flush(bs) or a more specific > cache flush (e.g. refcount block cache). > > This series passes qemu-iotests.
Thanks, applied all to the block branch. Kevin
