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    SubjectRe: [RFC PATCH V2 13/22] x86/intel_rdt: Support schemata write - pseudo-locking core
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    Hi Thomas,

    On 2/20/2018 9:15 AM, Thomas Gleixner wrote:
    > Let's look at the existing crtl/mon groups which are each represented by a
    > directory already.
    >
    > - Adding a 'size' file to the ctrl groups would be a natural extension
    > which makes sense for regular cache allocations as well.
    >

    I would like to clarify how you envision the value of "size" computed. A
    resource group may have several resources associated with it. Some of
    these resources may indeed overlap, for example, if there is L2 and L3
    CAT capable resources on the system. Similarly when CDP is enabled,
    there would be overlap in bitmasks referring to the same cache locations
    but treated as different resources. Indeed, there may in the future be
    some resources that are capable of allocation but not cache specifically
    that could also be handled within a single resource group.

    Summarizing all of these cases with a single "size" associated with the
    resource group does not seem straightforward to me.

    Reinette

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