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    SubjectRe: [PATCH v3 0/6] powerpc: queued spinlocks and rwlocks
    On Tue, Jul 07, 2020 at 03:57:06PM +1000, Nicholas Piggin wrote:
    > Yes, powerpc could certainly get more performance out of the slow
    > paths, and then there are a few parameters to tune.

    Can you clarify? The slow path is already in use on ARM64 which is weak,
    so I doubt there's superfluous serialization present. And Will spend a
    fair amount of time on making that thing guarantee forward progressm, so
    there just isn't too much room to play.

    > We don't have a good alternate patching for function calls yet, but
    > that would be something to do for native vs pv.

    Going by your jump_label implementation, support for static_call should
    be fairly straight forward too, no?

    https://lkml.kernel.org/r/20200624153024.794671356@infradead.org

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