Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753272Ab0G0WrT (ORCPT ); Tue, 27 Jul 2010 18:47:19 -0400 Received: from mail-bw0-f46.google.com ([209.85.214.46]:51960 "EHLO mail-bw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751206Ab0G0WrR (ORCPT ); Tue, 27 Jul 2010 18:47:17 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:mime-version:content-type :content-disposition:user-agent; b=BLQF1X6GGgmD5VqkrvpcBNOQ6GrRtSunZZ6IOMNbcdscvbqE8RoX2jVlnyE1PzB7iX RjOX5iliihx6Jn1EgKbPKYM39hCD/lCfBpD5oDWiRVUxd3Sqyfjn8PdB6PSX2b+beeAf B0Z5ob+N36L2yYla6ZpP3O08ok8ld2miokYTc= Date: Wed, 28 Jul 2010 00:44:08 +0200 From: Marcin Slusarz To: LKML Cc: Steven Rostedt , Frederic Weisbecker , Ingo Molnar Subject: [PATCH] tracing: wake up tasks reading trace_pipe on write to trace_marker Message-ID: <20100727224408.GB4142@joi.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1080 Lines: 32 Currently we rely on other code periodically waking up trace reader. If there aren't any other data than markers, reader will never be woken up. Fix it. Signed-off-by: Marcin Slusarz Cc: Steven Rostedt Cc: Frederic Weisbecker Cc: Ingo Molnar --- kernel/trace/trace.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 086d363..02e04c8 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1520,6 +1520,7 @@ int trace_array_vprintk(struct trace_array *tr, if (!filter_check_discard(call, entry, buffer, event)) { ring_buffer_unlock_commit(buffer, event); ftrace_trace_stack(buffer, irq_flags, 6, pc); + trace_wake_up(); } out_unlock: -- 1.7.1.1 -- 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/