On 09/13/2013 01:48 PM, Peter Lieven wrote: >>>> + flags = BDRV_O_RDWR | BDRV_O_UNMAP; >>> I think this should be a new command-line flag. >> I agree - while 'sparse by default' may be reasonable, it is also >> feasible to want a mode that guarantees expansion rather than unmapped >> or sparse. >> > Ok, so do you find the proposed -S 0 bei Paolo a good choice? > If this is supplied I would go as far as completly setting > has_zero_init = 0 also for targets which default to 1. This > would guaranteed exspansion and full allocation for all drivers.
Yeah, works for me - an optional mode that guarantees full allocation. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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