Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752755AbdI1LrW (ORCPT ); Thu, 28 Sep 2017 07:47:22 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:53824 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751082AbdI1LrV (ORCPT ); Thu, 28 Sep 2017 07:47:21 -0400 Date: Thu, 28 Sep 2017 13:47:05 +0200 From: Peter Zijlstra To: Sergey Senozhatsky Cc: Sasha Levin , Thomas Gleixner , Ingo Molnar , "linux-kernel@vger.kernel.org List" , alexander.levin@verizon.com, pmladek@suse.com, sergey.senozhatsky@gmail.com, rostedt@goodmis.org Subject: Re: sched: serial port lockdep warning when offlining CPUs Message-ID: <20170928114705.4a2iaek26qcdo7qk@hirez.programming.kicks-ass.net> References: <20170928093847.zgcgvxb7ajiaywbr@hirez.programming.kicks-ass.net> <20170928103032.GA2380@jagdpanzerIV.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170928103032.GA2380@jagdpanzerIV.localdomain> User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 837 Lines: 23 On Thu, Sep 28, 2017 at 07:30:32PM +0900, Sergey Senozhatsky wrote: > --- > > lib/ratelimit.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/lib/ratelimit.c b/lib/ratelimit.c > index 08f8043cac61..bddc55834c2e 100644 > --- a/lib/ratelimit.c > +++ b/lib/ratelimit.c > @@ -48,7 +48,8 @@ int ___ratelimit(struct ratelimit_state *rs, const char *func) > if (time_is_before_jiffies(rs->begin + rs->interval)) { > if (rs->missed) { > if (!(rs->flags & RATELIMIT_MSG_ON_RELEASE)) { > - pr_warn("%s: %d callbacks suppressed\n", func, rs->missed); > + printk_deferred(KERN_WARN "%s: %d callbacks suppressed\n", > + func, rs->missed); > rs->missed = 0; > } > } Oh cute; I figured it was the syslog daemon suppressing multiple identical lines, but yes the above looks very plausible.