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Date: Thu, 14 Mar 2013 16:00:14 +0100
From: Kevin Wolf <kwolf@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 07/13] qcow2: Allow lazy refcounts to be
 enabled on the command line
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To: Eric Blake <eblake@redhat.com>
Cc: qemu-devel@nongnu.org, anthony@codemonkey.ws

Am 14.03.2013 um 15:45 hat Eric Blake geschrieben:
> On 03/12/2013 08:41 AM, Kevin Wolf wrote:
> > qcow2 images now accept a boolean lazy_refcounts options. Use it like
> > this:
> > 
> >   -drive file=test.qcow2,lazy_refcounts=on
> > 
> > If the option is specified on the command line, it overrides the default
> > specified by the qcow2 header flags that were set when creating the
> > image.
> 
> Question - how would I get at the lazy_refcounts option when hotplugging
> a drive after the fact?  In other words, we need to wire up access to
> per-format options into QMP, to match what we have done on the command line.

We do and I hope I'll get to it soon. Maybe we should create a wiki page
for all open -blockdev tasks.

Another thing that is yet unclear is how to make these options
discoverable. At the moment you just have to know that qcow2 accepts a
lazy_refcounts option.

Kevin