Can you reproduce with Ceph debug logging enabled (i.e. debug rbd=20 in your ceph.conf)? If you could attach the log to the Ceph tracker ticket I opened [1], that would be very helpful. [1] http://tracker.ceph.com/issues/13726 Thanks, Jason ----- Original Message ----- > From: "Alexandre DERUMIER" <aderumier@xxxxxxxxx> > To: "ceph-devel" <ceph-devel@xxxxxxxxxxxxxxx> > Cc: "qemu-devel" <qemu-devel@xxxxxxxxxx>, jdurgin@xxxxxxxxxx > Sent: Monday, November 9, 2015 5:48:45 AM > Subject: Re: [Qemu-devel] qemu : rbd block driver internal snapshot and vm_stop is hanging forever > > adding to ceph.conf > > [client] > rbd_non_blocking_aio = false > > > fix the problem for me (with rbd_cache=false) > > > (@cc jdurgin@xxxxxxxxxx) > > > > ----- Mail original ----- > De: "Denis V. Lunev" <den-lists@xxxxxxxxxxxxx> > À: "aderumier" <aderumier@xxxxxxxxx>, "ceph-devel" > <ceph-devel@xxxxxxxxxxxxxxx>, "qemu-devel" <qemu-devel@xxxxxxxxxx> > Envoyé: Lundi 9 Novembre 2015 08:22:34 > Objet: Re: [Qemu-devel] qemu : rbd block driver internal snapshot and vm_stop > is hanging forever > > On 11/09/2015 10:19 AM, Denis V. Lunev wrote: > > On 11/09/2015 06:10 AM, Alexandre DERUMIER wrote: > >> 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 > >> > > this could look like the problem I have recenty trying to > > fix with dataplane enabled. Patch series is named as > > > > [PATCH for 2.5 v6 0/10] dataplane snapshot fixes > > > > Den > > anyway, even if above will not help, can you collect gdb > traces from all threads in QEMU process. May be I'll be > able to give a hit. > > Den > -- > 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
