Something is really wrong, because guest is also freezing, with a simple snapshot, with cache=none / rbd_cache=false qemu monitor : snapshot_blkdev_internal drive-virtio0 snap1 or rbd command : rbd --image myrbdvolume snap create --snap snap1 Then the guest can't read/write to disk anymore. I have tested with last ceph internalis, same problem ----- Mail original ----- De: "aderumier" <aderumier@xxxxxxxxx> À: "ceph-devel" <ceph-devel@xxxxxxxxxxxxxxx>, "qemu-devel" <qemu-devel@xxxxxxxxxx> Envoyé: Lundi 9 Novembre 2015 04:54:23 Objet: Re: [Qemu-devel] qemu : rbd block driver internal snapshot and vm_stop is hanging forever Also, this occur only with rbd_cache=false or qemu drive cache=none. If I use rbd_cache=true or qemu drive cache=writeback, I don't have this bug. ----- Mail original ----- De: "aderumier" <aderumier@xxxxxxxxx> À: "ceph-devel" <ceph-devel@xxxxxxxxxxxxxxx>, "qemu-devel" <qemu-devel@xxxxxxxxxx> Envoyé: Lundi 9 Novembre 2015 04:23:10 Objet: Re: qemu : rbd block driver internal snapshot and vm_stop is hanging forever Some other infos: I can reproduce it too with manual snapshot with rbd command #rbd --image myrbdvolume snap create --snap snap1 qemu monitor: #stop This is with ceph hammer 0.94.5. in qemu vm_stop, the only thing related to block driver are bdrv_drain_all(); ret = bdrv_flush_all(); ----- Mail original ----- De: "aderumier" <aderumier@xxxxxxxxx> À: "ceph-devel" <ceph-devel@xxxxxxxxxxxxxxx>, "qemu-devel" <qemu-devel@xxxxxxxxxx> Envoyé: Lundi 9 Novembre 2015 04:10:45 Objet: qemu : rbd block driver internal snapshot and vm_stop is hanging forever Hi, with qemu (2.4.1), if I do an internal snapshot of an rbd device, then I pause the vm with vm_stop, the qemu process is hanging forever monitor commands to reproduce: # snapshot_blkdev_internal drive-virtio0 yoursnapname # stop I don't see this with qcow2 or sheepdog block driver for example. Regards, Alexandre -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
