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Message-ID: <87wprd8uct.fsf@ashishki-desk.ger.corp.intel.com>
Date:	Wed, 13 Jan 2016 15:46:58 +0200
From:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:	Peter Zijlstra <peterz@...radead.org>, mingo@...nel.org,
	eranian@...gle.com
Cc:	linux-kernel@...r.kernel.org, vince@...ter.net, dvyukov@...gle.com,
	andi@...stfloor.org, jolsa@...hat.com
Subject: Re: [RFC][PATCH 12/12] perf: Collapse and fix event_function_call() users

Peter Zijlstra <peterz@...radead.org> writes:

> @@ -2250,7 +2269,11 @@ static void __perf_event_enable(struct p
>  	if (leader != event && leader->state != PERF_EVENT_STATE_ACTIVE)
>  		return;
>  
> -	ctx_resched(cpuctx, ctx);
> +	task_ctx = cpuctx->task_ctx;
> +	if (ctx->task)
> +		WARN_ON_ONCE(task_ctx != ctx);
> +
> +	ctx_resched(cpuctx, task_ctx);

Afaict, ctx_resched() path already does this in task_ctx_sched_out().

Regards,
--
Alex

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