[sheepdog] [PATCH v3 3/3] journal: new journal flag JF_DELETE_OBJ for deleting object

[Hitoshi Mitake]

At Mon, 06 May 2013 22:05:48 +0800,
Liu Yuan wrote:
> 
> On 05/06/2013 09:42 PM, Hitoshi Mitake wrote:
> > Sorry for my late reply. I think the event sequence might happen.
> > Because it seems that QEMU doesn't have mechanisms for forbiding the
> > above sequence. So we should prepare for it.
> > 
> > How do you think? If you agree, I'll send a refined version.
> 
> I think we don't need to handle 'object deletion'. Even if above example
> happens, it doesn't do harm to VM. Just some objects are preallocated.

Ah, I see. But the preallocated objects would consume disk
space. Removing them physically would be benefitical for thin
provisioning, I think. How do you think?

Thanks,
Hitoshi