Messages in this thread | | | Date | Thu, 17 Jun 2021 12:23:06 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 0/4] perf: Fix the ctx->pmu for a hybrid system |
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On Wed, Jun 16, 2021 at 11:55:30AM -0700, kan.liang@linux.intel.com wrote:
> To fix the issue, the generic perf codes have to understand the > supported CPU mask of a specific hybrid PMU. So it can update the > ctx->pmu accordingly, when a task is scheduled on a CPU which has > a different type of PMU from the previous CPU. The supported_cpus > has to be moved to the struct pmu.
Urghh.. I so hate this :-/
I *did* point you to:
https://lore.kernel.org/lkml/20181010104559.GO5728@hirez.programming.kicks-ass.net/
when you started this whole hybrid crud, and I think that's still the correct thing to do.
Still, let me consider if there's a workable short-term cludge I hate less.
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