[ovirt-users] Weekly fstrim & Ubuntu 16.04 LTS guest freeze

[Yaniv Kaul]

On Mon, Mar 12, 2018 at 1:40 PM, Andrei Verovski <andreil1 at starlett.lv>
wrote:

> Hi !
>
>
> I have stubborn VM (Ubuntu 16.04 LTS) which randomly freezes about each 2
> - 3 weeks at weekends (when load is close to zero).
> No updates or kernel upgrades help.
> Freeze is not detected by oVirt watchdog and VM is not automatically
> restarted.
>
> Since it happens only on weekends, I suspect some weekly cron job may
> cause this.
> Ubuntu 16.04 LTS is installed on qcow2 disk image (thin provision).
> is it possible that fstrim (which discards / trims unused blocks) is a
> source of this problem ?
>

Are you using virtio-blk (which doesn't support it) or virtio-SCSI (which
does)?
Also, does the storage support trimming? Not all do.
Y.


>
> Thanks in advance
> Andrei
>
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