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Date:   Mon, 29 Aug 2022 14:04:33 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Ravi Bangoria <ravi.bangoria@amd.com>
Cc:     acme@kernel.org, alexander.shishkin@linux.intel.com,
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        catalin.marinas@arm.com, linux-arm-kernel@lists.infradead.org,
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        sandipan.das@amd.com, ananth.narayan@amd.com, kim.phillips@amd.com,
        santosh.shukla@amd.com
Subject: Re: [PATCH] perf: Rewrite core context handling
Message-ID: <YwyrUYS30gVbxc2D@hirez.programming.kicks-ass.net>
References: <20220829113347.295-1-ravi.bangoria@amd.com>
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On Mon, Aug 29, 2022 at 05:03:47PM +0530, Ravi Bangoria wrote:
> @@ -12598,6 +12590,7 @@ EXPORT_SYMBOL_GPL(perf_event_create_kernel_counter);
>  
>  void perf_pmu_migrate_context(struct pmu *pmu, int src_cpu, int dst_cpu)
>  {
> +#if 0 // XXX buggered - cpu hotplug, who cares
>  	struct perf_event_context *src_ctx;
>  	struct perf_event_context *dst_ctx;
>  	struct perf_event *event, *tmp;
> @@ -12658,6 +12651,7 @@ void perf_pmu_migrate_context(struct pmu *pmu, int src_cpu, int dst_cpu)
>  	}
>  	mutex_unlock(&dst_ctx->mutex);
>  	mutex_unlock(&src_ctx->mutex);
> +#endif
>  }
>  EXPORT_SYMBOL_GPL(perf_pmu_migrate_context);
>  

Note to self; fix this :-) I'll see if I have time for that later today.