Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756924Ab1EKQIA (ORCPT ); Wed, 11 May 2011 12:08:00 -0400 Received: from mx1.redhat.com ([209.132.183.28]:11441 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756018Ab1EKPzu (ORCPT ); Wed, 11 May 2011 11:55:50 -0400 From: Avi Kivity To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo Subject: [PATCH v1 3/5] perf: export perf_event_refresh() to modules Date: Wed, 11 May 2011 11:55:31 -0400 Message-Id: <1305129333-7456-4-git-send-email-avi@redhat.com> In-Reply-To: <1305129333-7456-1-git-send-email-avi@redhat.com> References: <1305129333-7456-1-git-send-email-avi@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2270 Lines: 61 KVM needs one-shot samples, since a PMC programmed to -X will fire after X events and then again after 2^40 events (i.e. variable period). Signed-off-by: Avi Kivity --- include/linux/perf_event.h | 5 +++++ kernel/events/core.c | 3 ++- 2 files changed, 7 insertions(+), 1 deletions(-) diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index de346a0..b317a8b 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -975,6 +975,7 @@ extern void perf_pmu_disable(struct pmu *pmu); extern void perf_pmu_enable(struct pmu *pmu); extern int perf_event_task_disable(void); extern int perf_event_task_enable(void); +extern int perf_event_refresh(struct perf_event *event, int refresh); extern void perf_event_update_userpage(struct perf_event *event); extern int perf_event_release_kernel(struct perf_event *event); extern struct perf_event * @@ -1170,6 +1171,10 @@ static inline void perf_event_delayed_put(struct task_struct *task) { } static inline void perf_event_print_debug(void) { } static inline int perf_event_task_disable(void) { return -EINVAL; } static inline int perf_event_task_enable(void) { return -EINVAL; } +static inline int perf_event_refresh(struct perf_event *event, int refresh) +{ + return -EINVAL; +} static inline void perf_sw_event(u32 event_id, u64 nr, int nmi, diff --git a/kernel/events/core.c b/kernel/events/core.c index f60b81c..6f58291 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -1747,7 +1747,7 @@ out: raw_spin_unlock_irq(&ctx->lock); } -static int perf_event_refresh(struct perf_event *event, int refresh) +int perf_event_refresh(struct perf_event *event, int refresh) { /* * not supported on inherited events @@ -1760,6 +1760,7 @@ static int perf_event_refresh(struct perf_event *event, int refresh) return 0; } +EXPORT_SYMBOL_GPL(perf_event_refresh); static void ctx_sched_out(struct perf_event_context *ctx, struct perf_cpu_context *cpuctx, -- 1.7.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/