Re: qemu logging/tracing option in domain xml

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On Mon, Dec 14, 2015 at 04:52:43PM +0300, Dmitry Andreev wrote:
> Hi all,
> 
> QEMU has the '-d' command line option to configure logs/traces.
> As I can see, <qemu:commandline> is the only way to set it in domain xml.
> 
> <qemu:commandline> makes a configuration tainted and doesn't allow to update
> tracing/logging configuration in runtime. The ability to update
> configuration in runtime will be very useful for us in Virtuozzo for QEMU
> problem investigation and development.
> 
> So I want to ask you will you mind if I prepare a patch-set that introduces
> a new section for domain xml with next scheme:
> 
> <element name="debug">
>   <zeroOrMore>
>     <element name="log">
>        <attribute name="name">
>          <ref name="filter-param-value"/>
>        </attribute>
>     </element>
>   </zeroOrMore>
> </element>
> 
> Is this acceptable?

IMHO I've always considered <qemu:commandline> to be appropriate for these
ad-hoc developer debugging flags. In addition I'm not hugely interested in
adding APIs for controlling QEMU's debugging facilities, since I think
these QEMU monitor commands are inherantly hypervisor specific.

Regards,
Daniel
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