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

From: Daniel P . Berrangé
Subject: Re: [PATCH v2 1/1] hw/s390x: modularize virtio-gpu-ccw
Date: Mon, 22 Feb 2021 17:30:50 +0000
User-agent: Mutt/2.0.5 (2021-01-21)

On Mon, Feb 22, 2021 at 06:18:57PM +0100, Boris Fiuczynski 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.

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