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Re: [Qemu-devel] [Qemu-block] [PATCH v2 0/3] block: Warn about usage of

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [Qemu-block] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols
Date: Fri, 08 May 2015 13:00:56 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0

On 08/05/2015 12:34, Kevin Wolf wrote:
> Am 08.05.2015 um 12:16 hat Paolo Bonzini geschrieben:
>> On 08/05/2015 12:08, Kevin Wolf wrote:
>>> If so, the commands seem to be hopelessly underspecified, especially
>>> with respect to error conditions. And where it says something about
>>> errors, it doesn't make sense: The server is forbidden to reply to a
>>> NBD_CMD_FLUSH if it failed... (qemu-nbd ignores this, obviously)
>> So does nbd-server. O:-)  Looks like you're reading the spec too
>> literally (which is never a bad thing).
> I don't think there is something like reading a spec too literally.
> Specs are meant to be read literally. If a specification is open to
> interpretation, you don't need it. So I'd rather say I've found a bug
> in the spec. ;-)

You have.  The bug is a single missing word ("successful") reply, but it
is still a bug.

There is another bug, in that it talks about "outstanding" writes rather
than completed" writes.

> As you already seem to be working on the NBD mailing list, do you want
> to fix this, or should I subscribe and send a patch myself?

You've been CCed on the fix.


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