linux-kernel - Re: [PATCH V6 06/14] perf/x86/intel: Use switch in intel_pmu_disable/enable

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Message-ID: <20200720162241.GU10769@hirez.programming.kicks-ass.net>
Date:   Mon, 20 Jul 2020 18:22:41 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     kan.liang@...ux.intel.com
Cc:     acme@...hat.com, mingo@...nel.org, linux-kernel@...r.kernel.org,
        jolsa@...nel.org, eranian@...gle.com,
        alexander.shishkin@...ux.intel.com, ak@...ux.intel.com
Subject: Re: [PATCH V6 06/14] perf/x86/intel: Use switch in
 intel_pmu_disable/enable_event

On Fri, Jul 17, 2020 at 07:05:46AM -0700, kan.liang@...ux.intel.com wrote:
> From: Kan Liang <kan.liang@...ux.intel.com>
> 
> Many items are checked in the intel_pmu_disable/enable_event. More items
> will be added later, e.g. perf metrics events.
> 
> Use switch, which is more efficient, to replace the if-else.

Perhaps explain how; does this actually generate a jump-table?