Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754745Ab3CONGl (ORCPT ); Fri, 15 Mar 2013 09:06:41 -0400 Received: from mail.skyhub.de ([78.46.96.112]:52627 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754691Ab3CONGi (ORCPT ); Fri, 15 Mar 2013 09:06:38 -0400 From: Borislav Petkov To: LKML Cc: Peter Zijlstra , Ingo Molnar , Frederic Weisbecker , Borislav Petkov , Robert Richter Subject: [RFC PATCH 0/3] Perf persistent events Date: Fri, 15 Mar 2013 14:06:26 +0100 Message-Id: <1363352789-17991-1-git-send-email-bp@alien8.de> X-Mailer: git-send-email 1.8.1.3.535.ga923c31 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1592 Lines: 46 From: Borislav Petkov Yeah, here's a refresh of the persistent events deal, accessing those is much cleaner now. Here's how: So kernel code initializes and enables the event at its convenience (during boot, whenever) and userspace goes and says: sys_perf_event_open(pattr,...) with pattr.persistent = 1. Userspace gets the persistent buffer file descriptor to read from. Without that, we get a normal perf file descriptor for the duration of the tracing. This saves all the diddling of trying to hand down file descriptors through debugfs or whatever. Instead, current perf code simply can use it. This is still RFC but things are starting to fall into place slowly. As always, any and all comments/suggestions are welcome. Borislav Petkov (3): perf: Add persistent events perf: Add persistent event facilities MCE: Enable persistent event arch/x86/kernel/cpu/mcheck/mce.c | 25 +++++++ include/linux/perf_event.h | 14 +++- include/uapi/linux/perf_event.h | 3 +- kernel/events/Makefile | 2 +- kernel/events/core.c | 27 +++++--- kernel/events/internal.h | 4 ++ kernel/events/persistent.c | 141 +++++++++++++++++++++++++++++++++++++++ 7 files changed, 202 insertions(+), 14 deletions(-) create mode 100644 kernel/events/persistent.c -- 1.8.1.3.535.ga923c31 -- 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/