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Re: [Qemu-devel] [PATCH 08/12] qemu-img: conditionally zero out target o
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From: |
Eric Blake |
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Subject: |
Re: [Qemu-devel] [PATCH 08/12] qemu-img: conditionally zero out target on convert |
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Date: |
Fri, 13 Sep 2013 13:52:44 -0600 |
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Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130805 Thunderbird/17.0.8 |
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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- [Qemu-devel] [PATCH 04/12] iscsi: add .bdrv_co_write_zeroes, (continued)
[Qemu-devel] [PATCH 07/12] block: introduce bdrv_zeroize, Peter Lieven, 2013/09/13
[Qemu-devel] [PATCH 05/12] block: add logical block provisioning information to BlockDriverInfo, Peter Lieven, 2013/09/13