Re: [Qemu-discuss] block device write caching, notifications, and QCOW2 issues

2016-10-24 Thread Fam Zheng
On Mon, 10/24 14:06, Christian Böhme wrote: > However, we have also seen regular files, whose data, according to the > filesystem, was modified weeks before the outage, but that nevertheless had > garbled contents after the restart. Such a constellation is rather > unexpected, > since it is unlik

[Qemu-discuss] block device write caching, notifications, and QCOW2 issues

2016-10-24 Thread Christian Böhme
Hello all, We are using Qemu as the VMM in a KVM/Linux setup with file=/var/⟨some regular file name⟩,if=none,id=drive-virtio,disk0,format=qcow2,cache=none as arguments to the only -drive option in th invocation, i.e., the VM is constructed with a single block device for persistent storage. T