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Re: [Qemu-block] [PATCH 2/2] raw_bsd: Convert to byte-based interface
From: |
Eric Blake |
Subject: |
Re: [Qemu-block] [PATCH 2/2] raw_bsd: Convert to byte-based interface |
Date: |
Mon, 27 Jun 2016 06:51:08 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
On 06/27/2016 06:19 AM, Paolo Bonzini wrote:
>
>
> On 24/06/2016 05:58, Eric Blake wrote:
>> Since the raw format driver is just passing things through, we can
>> do byte-based read and write if the underlying protocol does
>> likewise.
>>
>> There's one tricky part - if we probed the image format, we document
>> that we restrict operations on the initial sector. Rather than
>> trying to handle a read-modify-write on the first sector, it's
>> easiest to just include in our restrictions that partial writes to
>> the first sector are not permitted.
>
> Can we just set the alignment to at least 512 if probed? It's the
> practical guest alignment anyway.
Interesting idea; should be fairly easy to attempt.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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