<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Aug 23, 2016 at 6:40 PM, Wolfgang Bucher <span dir="ltr"><<a href="mailto:wolfgang.bucher@netland-mn.de" target="_blank">wolfgang.bucher@netland-mn.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
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<p style="padding:0;margin:0"><span style="font-size:12pt;font-family:tahoma,arial,helvetica,sans-serif">Hello<br></span></p>
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<p style="padding:0;margin:0"><span style="font-size:12pt;font-family:tahoma,arial,helvetica,sans-serif">in var log messages i get following :<br></span></p>
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<p style="padding:0;margin:0"><span style="font-size:12pt;font-family:tahoma,arial,helvetica,sans-serif">kernel: XFS: possible memory allocation deadlock in kmem_alloc (<a>mode:0x250</a>)<br></span></p>
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<p style="padding:0;margin:0"><span style="font-size:12pt;font-family:tahoma,arial,helvetica,sans-serif">I have this problem on 4 different hosts.<br></span></p>
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<p style="padding:0;margin:0"><span style="font-size:12pt;font-family:tahoma,arial,helvetica,sans-serif">This happens during copying files from network to a thin provisioned disk, no problems with preallocated disks.<br></span></p></div></blockquote><div><br></div><div>What kind of storage are you using? local storage? Even though, it makes little sense to me - the disk is a qcow2 disk, which shouldn't be very fragmented as you might think (qcow2 grows in 64K chunks).</div><div>It may grow and grow and grow (until you sparsify it), but that's not going to cause fragmentation. What causes it to be fragmented? Perhaps the internal qcow2 mapping is quite fragmented?</div><div>Y.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><p style="padding:0;margin:0"><span style="font-size:12pt;font-family:tahoma,arial,helvetica,sans-serif"></span></p>
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<p style="padding:0;margin:0"><span style="font-size:12pt;font-family:tahoma,arial,helvetica,sans-serif">Thanks<br></span></p>
<p style="padding:0;margin:0"><span style="font-size:12pt;font-family:tahoma,arial,helvetica,sans-serif">Wolfgang<br></span></p>
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<blockquote style="border-left:2px solid #325fba;padding-left:5px;margin:0px 5px"><span style="font-family:tahoma,arial,helvetica,sans-serif;font-size:10pt">-----Ursprüngliche Nachricht-----<br><span><strong>Von:</strong> Michal Skrivanek <<a href="mailto:michal.skrivanek@redhat.com" target="_blank">michal.skrivanek@<wbr>redhat.com</a>></span><br><span><strong>Gesendet:</strong> Die 23 August 2016 17:11</span><br><span><strong>An:</strong> Wolfgang Bucher <<a href="mailto:wolfgang.bucher@netland-mn.de" target="_blank">wolfgang.bucher@netland-mn.de</a><wbr>></span><br><span><strong>CC:</strong> Milan Zamazal <<a href="mailto:mzamazal@redhat.com" target="_blank">mzamazal@redhat.com</a>>; <a href="mailto:users@ovirt.org" target="_blank">users@ovirt.org</a> (<a href="mailto:users@ovirt.org" target="_blank">users@ovirt.org</a>) <<a href="mailto:users@ovirt.org" target="_blank">users@ovirt.org</a>></span><br><span><strong>Betreff:</strong> Re: [ovirt-users] Problem starting VMs</span><br><br></span><div><div class="h5">
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<div>On 23 Aug 2016, at 11:06, Wolfgang Bucher <<a href="mailto:wolfgang.bucher@netland-mn.de" title="Der externe Link wird in einem neuen Fenster geöffnet" target="_blank">wolfgang.bucher@netland-mn.de</a><wbr>> wrote:</div>
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<div style="padding:0px;margin:0px"><span style="font-size:12pt;font-family:tahoma,arial,helvetica,sans-serif">Thank's<br></span></div>
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<div style="padding:0px;margin:0px"><span style="font-size:12pt;font-family:tahoma,arial,helvetica,sans-serif">but what do you mean with "</span><span style="font-size:12pt">initialization is finished”</span></div>
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until it gets from WaitForLaunch to PoweringUp state, effectively until the qemu process properly starts up</div>
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<div style="padding:0px;margin:0px"><span style="font-size:12pt">sometimes the vm crashes while copying files!<br></span></div>
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when exactly? Can you describe exactly what you are doing and what is reported as a reason for crash. When exactly does it crash and how?</div>
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<div>Thanks,</div>
<div>michal</div>
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<div style="padding:0px;margin:0px"><span style="font-size:12pt">Wolfgang<br></span></div>
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<blockquote style="border-left:2px solid #325fba;padding-left:5px;margin:0px 5px"><span style="font-family:tahoma,arial,helvetica,sans-serif;font-size:10pt">-----Ursprüngliche Nachricht-----<br><span><strong>Von:</strong> Milan Zamazal <<a href="mailto:mzamazal@redhat.com" title="Der externe Link wird in einem neuen Fenster geöffnet" target="_blank">mzamazal@redhat.com</a>></span><br><span><strong>Gesendet:</strong> Die 23 August 2016 16:59</span><br><span><strong>An:</strong> Wolfgang Bucher <<a href="mailto:wolfgang.bucher@netland-mn.de" title="Der externe Link wird in einem neuen Fenster geöffnet" target="_blank">wolfgang.bucher@netland-mn.de</a><wbr>></span><br><span><strong>CC:</strong> <a href="mailto:users@ovirt.org" title="Der externe Link wird in einem neuen Fenster geöffnet" target="_blank">users@ovirt.org</a> (<a href="mailto:users@ovirt.org" title="Der externe Link wird in einem neuen Fenster geöffnet" target="_blank">users@ovirt.org</a>) <<a href="mailto:users@ovirt.org" title="Der externe Link wird in einem neuen Fenster geöffnet" target="_blank">users@ovirt.org</a>></span><br><span><strong>Betreff:</strong> Re: AW: Problem starting VMs</span><br><br></span>
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<pre style="white-space:pre-wrap;word-wrap:break-word">Wolfgang Bucher <<a href="mailto:wolfgang.bucher@netland-mn.de" title="Der externe Link wird in einem neuen Fenster geöffnet" target="_blank">wolfgang.bucher@netland-mn.de</a><wbr>> writes:<br><br>> the problem is "waiting for launch" takes up to 20 min.<br>><br>><br>> I did a lot of tests with some vm's and th problem is:<br>><br>><br>> 1. create a win2012 server<br>><br>> 2. attache a new disk (thin provision)<br>><br>> 3. fill the disk from network share with about 100G<br>><br>> 4. shutdown the vm<br>><br>> 5. reboot host and try starting the vm (takes a lot of time until launch)<br>><br>><br>><br>> It's because of a high fragmented filessystem <br><br>I see, thank you for the explanation. In such a case, it may take a lot<br>of time before all the initialization is finished.<br><br>Regards,<br>Milan<br></pre>
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