Re: [Qemu-devel] [RFC PATCH 1/1] ceph/rbd block driver for qemu-kvm

[Avi Kivity]

On 05/25/2010 03:03 PM, Christoph Hellwig wrote:
> On Tue, May 25, 2010 at 02:25:53PM +0300, Avi Kivity wrote:
>    
> > Currently if someone wants to add a new block format, they have to
> > upstream it and wait for a new qemu to be released.  With a plugin API,
> > they can add a new block format to an existing, supported qemu.
> >      
> So?  Unless we want a stable driver ABI which I fundamentally oppose as
> it would make block driver development hell

We'd only freeze it for a major release.

> they'd have to wait for
> a new release of the block layer.  It's really just going to be a lot
> of pain for no major gain.  qemu releases are frequent enough, and if
> users care enough they can also easily patch qemu.
>    

May not be so easy for them, they lose binary updates from their distro 
and have to keep repatching.

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