Re: [Qemu-devel] [RFC]virtio-blk: add disk-name device property

[Yang Zhang <yang.zhang.wz@gmail.com>]

On 2017/1/4 22:44, Stefan Hajnoczi wrote:
> On Tue, Jan 03, 2017 at 10:53:06AM -0600, Eric Blake wrote:
>> On 12/29/2016 08:41 PM, Junkang Fu wrote:
>>> >From 74e913fc41ea98d1dde692175f1e3fb6729342aa Mon Sep 17 00:00:00 2001
>>> From: "junkang.fjk" <junkang.fjk@alibaba-inc.com>
>>> Date: Wed, 24 Aug 2016 19:36:53 +0800
>>> Subject: [PATCH] virtio-blk: add disk-name device property
>>>
>>> Current virtio-blk disk name(ex. /dev/vdb) has nothing to do with the
>>> target dev
>>> name specified in libvirt xml file. For example, we may get disk name
>>> /dev/vdb in
>>> VM while target dev specified in libvirt xml is vdc.
>>
>> It's not really libvirt's fault.  The libvirt XML names are for
>> convenience, but nothing on the host side requires the guest to pick the
>> same naming scheme as the host.
>>
>> I guess your proposal is to enhance the virtio spec such that clients
>> that are new enough to honor the new addition to the virtio spec will
>> change their name-picking algorithm to use the name provided by the
>> host, rather than their current approach of picking whatever name they
>> feel like, and then enhance libvirt to pass the XML name on down to the
>> guest?  It might work, but as others have pointed out, it will require a
>> virtio spec change first.
>
> This change is unnecessary.  The -device virtio-blk-pci,serial= property
> already exists for this purpose.

how about the /dev/vdabc? I guess lots of people prefer to use it 
instead of /dev/disk/by-id/xxx?

-- 
Yang
Alibaba Cloud Computing