Re: [Xen-devel] [PATCH v3 0/7] enable Cache QoS Monitoring (CQM) feature

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 29.11.13 at 16:29, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> On Fri, 2013-11-29 at 13:48 +0800, dongxiao.xu@xxxxxxxxx wrote:
>> From: Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
>> 
>> Changes from v2:
>>  - Address comments from Andrew Cooper, including:
>>    * Merging tools stack changes into one patch.
>>    * Reduce the IPI number to one per socket.
>>    * Change structures for CQM data exchange between tools and Xen.
>>    * Misc of format/variable/function name changes.
>>  - Address comments from Konrad Rzeszutek Wilk, including:
>>    * Simplify the error printing logic.
>>    * Add xsm check for the new added hypercalls.
>> 
>> Changes from v1:
>>  - Address comments from Andrew Cooper, including:
>>    * Change function names, e.g., alloc_cqm_rmid(), system_supports_cqm(), 
> etc.
>>    * Change some structure element order to save packing cost.
>>    * Correct some function's return value.
>>    * Some programming styles change.
>>    * ...
>> 
>> Future generations of Intel Xeon processor may offer monitoring capability 
> in
>> each logical processor to measure specific quality-of-service metric,
>> for example, the Cache QoS Monitoring to get L3 cache occupancy.
>> Detailed information please refer to Intel SDM chapter 17.14.
> 
> Is this being proposed for 4.4? I think it is rather late to be adding
> such stuff.

I think we already settled on not taking it, and Intel indicated
that they're fine with that decision.

Jan


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