Re: [Xen-devel] Resizing block devices live?

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 18.12.12 at 15:06, George Dunlap <George.Dunlap@xxxxxxxxxxxxx> wrote:
> On Tue, Dec 18, 2012 at 1:58 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx>wrote:
> 
>> On Tue, 2012-12-18 at 13:52 +0000, George Dunlap wrote:
>> > One of the requests from the xenorg.uservoice.com page that had a
>> > moderate amount of interest was to allow block devices to be resized.
>> > There's a description here:
>> >
>> >
>> 
> https://xenorg.uservoice.com/forums/172169-xen-development/suggestions/3140313-i
>  
> mplement-block-device-resize
>> >
>> >
>> > I have no idea what this would take -- can anyone comment?
>>
>> Doesn't that already work? I thought this was patch in the PV block
>> drivers ages ago...
>>
>> Yes, http://wiki.xen.org/wiki/XenParavirtOps lists it under 2.6.36.
>>
>> Maybe this is a missing feature of (lib)xl vs xend?
>>
> 
> "xm help" doesn't show a "block-resize" command, nor does grepping through
> tools for "resize" turn up anything.
> 
> Would someone be willing to do some investigation into whether such a
> command is implemented in the protocol, and what it would take to get a "xm
> block-resize" command working?  (Not necessarily do it, but have an idea
> what probably needs to be done.)

Have a look at http://xenbits.xen.org/hg/linux-2.6.18-xen.hg/rev/f7f420bd7b7a
- I don't think there is a strict need for xm/xl commands, except as
a courtesy.

Jan


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