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Date: Mon, 02 May 2011 12:25:30 +0200
From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] debug logging
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To: qemu-devel@nongnu.org

   Hi,

> dbg_print takes care of making it standard to have a loglevel and prefix, sounds
> good, but I'd still like to know if it is acceptable to also redirect with -debug,
> I guess reusing the DeviceState then, instead of my added struct, so just letting
> DeviceState.debug_chardev == NULL by default, and settable with
> -debug<devname>,id=<chardev_id>

Making dbg_print use DeviceState.debug_chardev (if present, stderr 
otherwise) looks sane to me.  Buf I'd use standard properties then to 
set it instead of a separate -debug switch, i.e.

   -chardev file,id=messages,path=... \
   -device foo,dbg=1,dbglog=messages

cheers,
   Gerd