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Re: [PATCH v2 1/1] hw/s390x: modularize virtio-gpu-ccw

From: Halil Pasic
Subject: Re: [PATCH v2 1/1] hw/s390x: modularize virtio-gpu-ccw
Date: Tue, 23 Feb 2021 13:14:51 +0100

On Mon, 22 Feb 2021 17:30:50 +0000
Daniel P. Berrangé <berrange@redhat.com> wrote:

> > Paolo, Daniel,
> > I am in general (s390 unrelated) a bit puzzled about the scenario of QEMU
> > being modularized.
> > Libvirt probes QEMU executables for their capabilities and creates a
> > capabilities cache of the probed QEMU binary. There are a few triggers that
> > invalidate the cache. One is the QEMU binary changing.
> > Is there one for QEMU modules being installed or uninstalled?
> > How is that supposed to work?  
> Libvirt doesn't check the modules specifically, but it does look at the
> mtime on the directory containing modules, and that should be touched
> when a moduled is added/removed.  This is since libvirt 6.8.0 or later.

It seems we are covered, at least upstream.

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