[ovirt-users] Problem starting VMs

[Wolfgang Bucher]

Hello



in var log messages i get following :



kernel: XFS: possible memory allocation deadlock in kmem_alloc (mode:0x250)



I have this problem on 4 different hosts.



This happens during copying files from network to a thin provisioned disk, no problems with preallocated disks.



Thanks

Wolfgang



-----Ursprüngliche Nachricht-----
Von: Michal Skrivanek <michal.skrivanek at redhat.com>
Gesendet: Die 23 August 2016 17:11
An: Wolfgang Bucher <wolfgang.bucher at netland-mn.de>
CC: Milan Zamazal <mzamazal at redhat.com>; users at ovirt.org (users at ovirt.org) <users at ovirt.org>
Betreff: Re: [ovirt-users] Problem starting VMs


On 23 Aug 2016, at 11:06, Wolfgang Bucher <wolfgang.bucher at netland-mn.de <mailto:wolfgang.bucher at netland-mn.de> > wrote:

Thank's

but what do you mean with "initialization is finished”

until it gets from WaitForLaunch to PoweringUp state, effectively until the qemu process properly starts up


sometimes the vm crashes while copying files!

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?

Thanks,
michal




Wolfgang


-----Ursprüngliche Nachricht-----
Von: Milan Zamazal <mzamazal at redhat.com <mailto:mzamazal at redhat.com> >
Gesendet: Die 23 August 2016 16:59
An: Wolfgang Bucher <wolfgang.bucher at netland-mn.de <mailto:wolfgang.bucher at netland-mn.de> >
CC: users at ovirt.org <mailto:users at ovirt.org> (users at ovirt.org <mailto:users at ovirt.org> ) <users at ovirt.org <mailto:users at ovirt.org> >
Betreff: Re: AW: Problem starting VMs


Wolfgang Bucher <wolfgang.bucher at netland-mn.de <mailto:wolfgang.bucher at netland-mn.de> > writes:

> the problem is "waiting for launch" takes up to 20 min.
>
>
> I did a lot of tests with some vm's and th problem is:
>
>
> 1.  create a win2012 server
>
> 2. attache a new disk (thin provision)
>
> 3. fill the disk from network share with about 100G
>
> 4. shutdown the vm
>
> 5. reboot host and try starting the vm (takes a lot of time until launch)
>
>
>
> It's because of a high fragmented filessystem 

I see, thank you for the explanation.  In such a case, it may take a lot
of time before all the initialization is finished.

Regards,
Milan

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