> Von: Pavel Gashev [p...@acronis.com] > Gesendet: Dienstag, 12. April 2016 16:15 > An: Markus Stockhausen; users > Betreff: Re: [ovirt-users] stalls during live Merge Centos 7 / qemu 2.3 > > Markus, > > I saw similar issues. Looks like it's related to multidisk VMs under high > disk load. No relations with guest OS. No relations with IO threads. > > > I didn't debug it. Can you please show a backtrace of a thread in > __lll_lock_wait ?
Hi Pavel. thanks for your response. I dont even need high disk load to reproduce the issue. Just a simple script that writes 8k blocks every 0.5 secs. I added the required info to the BZ. https://bugzilla.redhat.com/show_bug.cgi?id=1319400 Markus > > > On 11/04/16 18:13, "users-boun...@ovirt.org on behalf of Markus Stockhausen" > <users-boun...@ovirt.org on behalf of stockhau...@collogia.de> wrote: > > >Hi there, > > > >I'm getting slowly mad about our new Centos 7 cluster. Whenever > >I start a live merge the machine completely freezes. It seems to be > >independent of the Guest OS (tried SLES 11 SP3, SLES11 SP4 and > >SLES12). I already opened BZ1319400 because I'm clueless. > > > >Doing the same in our Fedora 20 cluster (qemu 2.1.3) we only see > >small hiccups of 1-3 seconds at the start of the live merge but no > >complete stall. Its the same VM! > > > >Just to be sure that it is not a specific problem of our topology > >or SLES I would like to receive some feedback of the list if anyone > >observes similar lockups in their environment. > > > >Thanks in advance. > > > >Markus > >
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