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Re: [Xen-devel] [PATCH 00/12] add per-domain and per-cpupool generic parameters
- To: Wei Liu <wei.liu2@xxxxxxxxxx>
- From: Juergen Gross <jgross@xxxxxxxx>
- Date: Fri, 21 Sep 2018 07:23:23 +0200
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- Cc: Tim Deegan <tim@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Daniel de Graaf <dgdegra@xxxxxxxxxxxxx>
- Delivery-date: Fri, 21 Sep 2018 05:23:49 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 20/09/18 18:06, Wei Liu wrote:
> On Wed, Sep 19, 2018 at 07:58:50PM +0200, Juergen Gross wrote:
>>
>> Did you look into the patches, especially patch 10? The parameters set
>> are all stored in domain config via libxl__arch_domain_save_config().
>
> No, I didn't.
>
> I think the general idea of what you do in patch 10 should work. However
> I want to comment on the implementation.
>
> It appears that the implementation in patch 10 concatenates the new
> settings to the old ones. It is not very nice imo.
>
> If for the life time of the domain you set X times the same parameter
> you get a string of foo=bar1 foo=bar2 in the saved config file.
>
> There is probably a simple solution: make the parameter list in IDL a
> key value list. You then update the list accordingly.
The problem with that approach are parameters with sub-parameters:
par=sub1=no,sub2=yes
par=sub2=yes
would remove the sub1=no setting.
Juergen
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