From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1753229AbcBVDhU (ORCPT <rfc822;w@1wt.eu>);
	Sun, 21 Feb 2016 22:37:20 -0500
Received: from mail113-249.mail.alibaba.com ([205.204.113.249]:60714 "EHLO
	us-alimail-mta1.hst.scl.en.alidc.net" rhost-flags-OK-OK-OK-FAIL)
	by vger.kernel.org with ESMTP id S1753162AbcBVDhR (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Sun, 21 Feb 2016 22:37:17 -0500
X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R161e4;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01l07380;MF=hillf.zj@alibaba-inc.com;NM=1;PH=DS;RN=5;SR=0;TI=SMTPD_----4Xdvdj7_1456112176;
Reply-To: "Hillf Danton" <hillf.zj@alibaba-inc.com>
From: "Hillf Danton" <hillf.zj@alibaba-inc.com>
To: "Mike Galbraith" <umgwanakikbuti@gmail.com>
Cc: "'Sebastian Andrzej Siewior'" <bigeasy@linutronix.de>,
        "'Thomas Gleixner'" <tglx@linutronix.de>,
        "'LKML'" <linux-kernel@vger.kernel.org>,
        "'linux-rt-users'" <linux-rt-users@vger.kernel.org>
Subject: Re: [patch]  sched,rt: __always_inline preemptible_lazy()
Date: Mon, 22 Feb 2016 11:36:16 +0800
Message-ID: <00a501d16d22$30045140$900cf3c0$@alibaba-inc.com>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-Mailer: Microsoft Outlook 14.0
Thread-Index: AdFtIZerJ6Z7U+IfRbSmr+VwI1/nQA==
Content-Language: zh-cn
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

> 
> homer: # nm kernel/sched/core.o|grep preemptible_lazy
> 00000000000000b5 t preemptible_lazy
> 
> echo wakeup_rt > current_tracer ==> Welcome to infinity.
> 
> Signed-off-bx: Mike Galbraith <umgwanakikbuti@gmail.com>
> ---

Fat finger?

BTW, would you please make a better description of the
problem this patch is trying to address/fix?

Hillf
>  kernel/sched/core.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -3469,7 +3469,7 @@ static void __sched notrace preempt_sche
>   * set by a RT task. Oterwise we try to avoid beeing scheduled out as long as
>   * preempt_lazy_count counter >0.
>   */
> -static int preemptible_lazy(void)
> +static __always_inline int preemptible_lazy(void)
>  {
>  	if (test_thread_flag(TIF_NEED_RESCHED))
>  		return 1;