From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753308AbcD2Eu5 (ORCPT ); Fri, 29 Apr 2016 00:50:57 -0400 Received: from mail-pa0-f41.google.com ([209.85.220.41]:34690 "EHLO mail-pa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753026AbcD2Eqg (ORCPT ); Fri, 29 Apr 2016 00:46:36 -0400 From: David Carrillo-Cisneros To: Peter Zijlstra , Alexander Shishkin , Arnaldo Carvalho de Melo , Ingo Molnar Cc: Vikas Shivappa , Matt Fleming , Tony Luck , Stephane Eranian , Paul Turner , David Carrillo-Cisneros , x86@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 17/32] perf/core: adding pmu::event_terminate Date: Thu, 28 Apr 2016 21:43:23 -0700 Message-Id: <1461905018-86355-18-git-send-email-davidcc@google.com> X-Mailer: git-send-email 2.8.0.rc3.226.g39d4020 In-Reply-To: <1461905018-86355-1-git-send-email-davidcc@google.com> References: <1461905018-86355-1-git-send-email-davidcc@google.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Allow a PMU to clean an event before the event's torn down in perf_events begins. Reviewed-by: Stephane Eranian Signed-off-by: David Carrillo-Cisneros --- include/linux/perf_event.h | 6 ++++++ kernel/events/core.c | 4 ++++ 2 files changed, 10 insertions(+) diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index b010b55..81e29c6 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -265,6 +265,12 @@ struct pmu { int (*event_init) (struct perf_event *event); /* + * Terminate the event for this PMU. Optional complement for a + * successful event_init. Called before the event fields are tear down. + */ + void (*event_terminate) (struct perf_event *event); + + /* * Notification that the event was mapped or unmapped. Called * in the context of the mapping task. */ diff --git a/kernel/events/core.c b/kernel/events/core.c index 6fd226f..2a868a6 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -3787,6 +3787,8 @@ static void _free_event(struct perf_event *event) ring_buffer_attach(event, NULL); mutex_unlock(&event->mmap_mutex); } + if (event->pmu->event_terminate) + event->pmu->event_terminate(event); if (is_cgroup_event(event)) perf_detach_cgroup(event); @@ -8293,6 +8295,8 @@ err_per_task: exclusive_event_destroy(event); err_pmu: + if (event->pmu->event_terminate) + event->pmu->event_terminate(event); if (event->destroy) event->destroy(event); module_put(pmu->module); -- 2.8.0.rc3.226.g39d4020