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Re: [Qemu-devel] [Nbd] [PATCH v2] doc: Add NBD_CMD_BLOCK_STATUS extensio

From: Alex Bligh
Subject: Re: [Qemu-devel] [Nbd] [PATCH v2] doc: Add NBD_CMD_BLOCK_STATUS extension
Date: Tue, 5 Apr 2016 16:27:04 +0100

On 5 Apr 2016, at 16:23, Paolo Bonzini <address@hidden> wrote:

>> I'm missing how the ugh-author can write the software without knowing
>> exactly what the bit does. Or are you saying "that's a matter
>> for the qemu spec, not the nbd spec"?
> Yes, that's it.  NBD defines a safe default and a general idea of what
> it should be used for.

OK, so my argument then is we should not have a special case
'only Qemu knows what this does' bit if we can avoid at, and
instead have a general system of 'proprietary bits' (unfortunate
word but perhaps 'non-NBD').

Of course this is made harder as the NBD_CMD_ size is not
extensible (today).

Alex Bligh

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