From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:35642 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753390AbdGSJnf (ORCPT ); Wed, 19 Jul 2017 05:43:35 -0400 Subject: Patch "tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results" has been added to the 3.18-stable tree To: pkondeti@codeaurora.org, amit.pundir@linaro.org, gregkh@linuxfoundation.org, rostedt@goodmis.org Cc: , From: Date: Wed, 19 Jul 2017 11:43:24 +0200 Message-ID: <1500457404797@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tracing-use-softirq_offset-for-softirq-dectection-for-more-accurate-results.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From c59f29cb144a6a0dfac16ede9dc8eafc02dc56ca Mon Sep 17 00:00:00 2001 From: Pavankumar Kondeti Date: Fri, 9 Dec 2016 21:50:17 +0530 Subject: tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results From: Pavankumar Kondeti commit c59f29cb144a6a0dfac16ede9dc8eafc02dc56ca upstream. The 's' flag is supposed to indicate that a softirq is running. This can be detected by testing the preempt_count with SOFTIRQ_OFFSET. The current code tests the preempt_count with SOFTIRQ_MASK, which would be true even when softirqs are disabled but not serving a softirq. Link: http://lkml.kernel.org/r/1481300417-3564-1-git-send-email-pkondeti@codeaurora.org Signed-off-by: Pavankumar Kondeti Signed-off-by: Steven Rostedt Signed-off-by: Amit Pundir Signed-off-by: Greg Kroah-Hartman --- kernel/trace/trace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1587,7 +1587,7 @@ tracing_generic_entry_update(struct trac TRACE_FLAG_IRQS_NOSUPPORT | #endif ((pc & HARDIRQ_MASK) ? TRACE_FLAG_HARDIRQ : 0) | - ((pc & SOFTIRQ_MASK) ? TRACE_FLAG_SOFTIRQ : 0) | + ((pc & SOFTIRQ_OFFSET) ? TRACE_FLAG_SOFTIRQ : 0) | (tif_need_resched() ? TRACE_FLAG_NEED_RESCHED : 0) | (test_preempt_need_resched() ? TRACE_FLAG_PREEMPT_RESCHED : 0); } Patches currently in stable-queue which might be from pkondeti@codeaurora.org are queue-3.18/tracing-use-softirq_offset-for-softirq-dectection-for-more-accurate-results.patch