Re: [PATCH v2 4/6] perf/amd/iommu: Introduce data structure for tracking prev count.

[Joerg Roedel]

On Fri, Jan 01, 2016 at 12:13:38PM -0600, Suravee Suthikulpanit wrote:
> To enable AMD IOMMU PMU to support multiple IOMMUs, this patch introduces
> a new data structure, perf_amd_iommu.prev_cnts, to track previous counts
> of IOMMU performance counters in multi-IOMMU environment.
> 
> Also, this patch allocates perf_iommu_cnts for internal use
> when manages counters.

>From this commit message I don't really get what perf_amd_iommu.prev_cnts
and perf_iommu_cnts will be used for. Can you please add this to the
message?

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