Re: [Qemu-block] RFC iscsi: set FUA and DPO if !bs->enable_write_cache

[Paolo Bonzini]

On 16/04/2015 14:43, Kevin Wolf wrote:
> > Of course cache=unsafe and cache.no-flush=on are not a good idea because
> > you want to flush the qcow2 caches for example.
> 
> Actually, cache=unsafe doesn't disable qcow2 cache writeback. That's the
> difference between .bdrv_co_flush_to_os as used by image formats and
> .bdrv_co_flush_to_disk/.bdrv_aio_flush used by the protocol layer; only
> the latter is disabled.

Oh, actually now I remember arguing with you about it! :)

> So cache=unsafe should be fine (and file.cache.* doesn't work yet, but
> I'm working on it at the moment).

Great, thanks!

Paolo