From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757604AbZCWIcU (ORCPT ); Mon, 23 Mar 2009 04:32:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757913AbZCWIbo (ORCPT ); Mon, 23 Mar 2009 04:31:44 -0400 Received: from hera.kernel.org ([140.211.167.34]:51630 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757898AbZCWIbn (ORCPT ); Mon, 23 Mar 2009 04:31:43 -0400 Date: Mon, 23 Mar 2009 08:31:02 GMT From: Frederic Weisbecker To: linux-tip-commits@vger.kernel.org Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com, fweisbec@gmail.com, rostedt@goodmis.org, tglx@linutronix.de, mingo@elte.hu Reply-To: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, fweisbec@gmail.com, rostedt@goodmis.org, tglx@linutronix.de, mingo@elte.hu In-Reply-To: <1237759847-21025-5-git-send-email-fweisbec@gmail.com> References: <1237759847-21025-5-git-send-email-fweisbec@gmail.com> Subject: [tip:tracing/filters] tracing/ftrace: make nop-tracer use polling wait for events on pipe Message-ID: Git-Commit-ID: 7e6ea92df3fd7cbe74e7985c6f3e40255c44b201 X-Mailer: tip-git-log-daemon MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0 (hera.kernel.org [127.0.0.1]); Mon, 23 Mar 2009 08:31:04 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 7e6ea92df3fd7cbe74e7985c6f3e40255c44b201 Gitweb: http://git.kernel.org/tip/7e6ea92df3fd7cbe74e7985c6f3e40255c44b201 Author: Frederic Weisbecker AuthorDate: Sun, 22 Mar 2009 23:10:47 +0100 Committer: Ingo Molnar CommitDate: Mon, 23 Mar 2009 09:22:15 +0100 tracing/ftrace: make nop-tracer use polling wait for events on pipe Impact: display events when they arrive Now that the events don't use wake_up() anymore, we need the nop tracer to poll waiting for events on the pipe. Especially because nop is useful to look at orphan traces types (traces types that don't rely on specific tracers) because it doesn't produce traces itself. And unlike other tracers that trigger specific traces periodically, nop triggers no traces by itself that can wake him. Signed-off-by: Frederic Weisbecker Cc: Steven Rostedt LKML-Reference: <1237759847-21025-5-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar --- kernel/trace/trace_nop.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/kernel/trace/trace_nop.c b/kernel/trace/trace_nop.c index 9aa84bd..394f944 100644 --- a/kernel/trace/trace_nop.c +++ b/kernel/trace/trace_nop.c @@ -91,6 +91,7 @@ struct tracer nop_trace __read_mostly = .name = "nop", .init = nop_trace_init, .reset = nop_trace_reset, + .wait_pipe = poll_wait_pipe, #ifdef CONFIG_FTRACE_SELFTEST .selftest = trace_selftest_startup_nop, #endif