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Re: [Qemu-devel] [PATCH] proto: add 'shift' extension.


From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH] proto: add 'shift' extension.
Date: Mon, 26 Sep 2016 15:54:58 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0


On 26/09/2016 15:53, Vladimir Sementsov-Ogievskiy wrote:
> On 26.09.2016 15:51, Paolo Bonzini wrote:
>> This is very ad hoc.  Can we instead have a block size common to all
>> commands?  Block devices in practice have one, in fact that's why
>> they're called block devices...
> 
> Block size can be too small to clear the whole disk in one request (i.e.
> (2**31 * block_size) is too small..)

Considering that NBD supports multiple outstanding requests, is it a big
deal to require one request per terabyte of storage?

Paolo



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