Re: [PATCH v5 0/8] Configurable policy for handling deprecated interfaces

[Peter Krempa]

On Mon, Sep 21, 2020 at 13:45:14 +0100, Richard W.M. Jones wrote:
> Some general comments on using the patch:
> 
> * For libguestfs I chose to add
> 
>   -compat deprecated-input=reject,deprecated-output=hide
> 
>   This is only enabled in developer builds of libguestfs when we
>   are running qemu directly (not via libvirt).  The patch for
>   this is attached.
> 
> * What's the point/difference in having reject vs crash?

I'll be adding the following documentation for the qemu.conf entry in
libvirt controling the feature:

+# The "reject" option is less harsh towards the VMs but some code paths ignore
+# errors reported by qemu and thus it may not be obvious that a deprecated
+# command/field was used, thus it's suggested to use the "crash" option 
instead.