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Re: [Qemu-devel] [PATCH v2 2/3] qapi: Add "detect-zeroes" option to driv


From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH v2 2/3] qapi: Add "detect-zeroes" option to drive-mirror
Date: Mon, 08 Jun 2015 12:47:02 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0


On 08/06/2015 12:34, Fam Zheng wrote:
>  - "unmap": whether the target sectors should be discarded where source has 
> only
>    zeroes. (json-bool, optional, default true)
> +- "detect-zeroes": if true, the source sectors that are zeroes will be 
> written as
> +  sparse on target. (json-bool, optional, default true)

all source sectors that are zeroes will be written using offloaded zero
writes on the target; furthermore, the sectors on the target will be
made sparse if possible if "unmap" is also true.

Perhaps it's simpler to use the enum though.  I'm not sure.  Jeff?

Paolo



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