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<div class="moz-cite-prefix">On 03/12/2018 01:50 PM, Yaniv Kaul
wrote:<br>
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cite="mid:CAJgorsYr0C2Mn9TuqeE0huo+dO24W+uSQqQRQx9EUZaOPovYEw@mail.gmail.com">
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<div class="gmail_quote">On Mon, Mar 12, 2018 at 1:40 PM,
Andrei Verovski <span dir="ltr"><<a
href="mailto:andreil1@starlett.lv" target="_blank"
moz-do-not-send="true">andreil1@starlett.lv</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi !<br>
<br>
<br>
I have stubborn VM (Ubuntu 16.04 LTS) which randomly
freezes about each 2 - 3 weeks at weekends (when load is
close to zero).<br>
No updates or kernel upgrades help.<br>
Freeze is not detected by oVirt watchdog and VM is not
automatically restarted.<br>
<br>
Since it happens only on weekends, I suspect some weekly
cron job may cause this.<br>
Ubuntu 16.04 LTS is installed on qcow2 disk image (thin
provision).<br>
is it possible that fstrim (which discards / trims unused
blocks) is a source of this problem ?<br>
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<div>Are you using virtio-blk (which doesn't support it) or
virtio-SCSI (which does)?</div>
<div>Also, does the storage support trimming? Not all do.</div>
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<br>
I'm using virtio-SCSI, Ubuntu thin provision disk formatted as ext4
boot + ext4 root + swap.<br>
Disk image on ext4 RAID 1.<br>
<br>
<blockquote type="cite"
cite="mid:CAJgorsYr0C2Mn9TuqeE0huo+dO24W+uSQqQRQx9EUZaOPovYEw@mail.gmail.com">
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<div>Y.</div>
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<br>
Thanks in advance<br>
Andrei<br>
<br>
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