From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 7 Aug 2024 11:29:29 +0000 (+0200)
Subject: perf: Optimize __pmu_ctx_sched_out()
X-Git-Tag: v6.12-rc1~145^2~17
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3e15a3fe3a2a170c5be52783667706875c088f96;p=thirdparty%2Fkernel%2Flinux.git

perf: Optimize __pmu_ctx_sched_out()

There is is no point in doing the perf_pmu_disable() dance just to do
nothing. This happens for ctx_sched_out(.type = EVENT_TIME) for
instance.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240807115550.392851915@infradead.org
---

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 197d3be443bbd..9893ba5e98aa2 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -3312,7 +3312,7 @@ static void __pmu_ctx_sched_out(struct perf_event_pmu_context *pmu_ctx,
 		cpc->task_epc = NULL;
 	}
 
-	if (!event_type)
+	if (!(event_type & EVENT_ALL))
 		return;
 
 	perf_pmu_disable(pmu);