Re: [PATCH v28 0/8] Timestamp synchronization of host - guest tracing session

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On Tue, 2021-02-09 at 08:03 +0200, Tzvetomir Stoyanov wrote:
> Hi Dario,
> 
Hi!

> On Tue, Feb 9, 2021 at 7:32 AM Dario Faggioli <dfaggioli@xxxxxxxx>
> wrote:
> > 
> > If necessary, I can provide more info about my setup, or do more
> > tests.
> 
> There are a few limitations that we are working to address:
>  1. Ensure that vhost_vsock module is loaded on the host.
>  2. You should add a vsock device manually to your VM config, I use
> "virsh edit <vm name>" to add:
>    <vsock model='virtio'>
>       <cid auto='yes'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x09'
> function='0x0'/>
>     </vsock>
> somewhere in the <devices> </devices> section.
> 
Yep, these are both fine. In fact, I tested host<-->guest communication
via vsock independently, and it works, so it does not seem a vsock
issue...

I also try without the series applied (but keeping patch 2) and it
still fails in the same way.

FTR, in the past, I've used trace-cmd from git with an earlier version
of this series applied (the "KVM clock" wasn't there yet) on the same
environment I'm using now, and it worked.

Regards
-- 
Dario Faggioli, Ph.D
http://about.me/dario.faggioli
Virtualization Software Engineer
SUSE Labs, SUSE https://www.suse.com/
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