Hi, the QEMU 4.1.0 release has two problems that can easily cause image corruption with any qcow2 images (no special configuration needed to trigger the bugs):
1. A locking bug in the qcow2 code. I just sent a pull request that includes the fix for this. The important patch there is: 'qcow2: Fix corruption bug in qcow2_detect_metadata_preallocation()' 2. A kernel bug in the XFS driver that became visible by new I/O patterns the qcow2 implementation started to use in 4.1. Max is currently working on a workaround for this. The Planning/4.1 wiki page tells me that a 4.1.1 release is planned for end of November, which isn't too far, but I was wondering if want to have a stable release even earlier, right after the fixes for both problems are in. Peter, if we haven't made a decision until then, maybe discussing this is an agenda item for QEMU Summit, too. Kevin
