From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752260Ab0JYFwJ (ORCPT ); Mon, 25 Oct 2010 01:52:09 -0400 Received: from mail.windriver.com ([147.11.1.11]:65152 "EHLO mail.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751103Ab0JYFwH (ORCPT ); Mon, 25 Oct 2010 01:52:07 -0400 Message-ID: <4CC51C7C.3050400@windriver.com> Date: Mon, 25 Oct 2010 13:58:20 +0800 From: DDD User-Agent: Thunderbird 2.0.0.24 (X11/20100317) MIME-Version: 1.0 To: Frederic Weisbecker , Peter Zijlstra CC: mingo@elte.hu, acme@redhat.com, paulus@samba.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] perf: fix possible divide-by-zero in perf_swevent_overflow() References: <1282824438-13970-1-git-send-email-dongdong.deng@windriver.com> <1282824727.1975.747.camel@laptop> <4C765FD3.9060904@windriver.com> <1282827486.1975.845.camel@laptop> <4C77ADC1.5030502@windriver.com> <1282913445.1975.2414.camel@laptop> <4C77BB6B.9090706@windriver.com> <20100827133735.GC5241@nowhere> In-Reply-To: <20100827133735.GC5241@nowhere> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 25 Oct 2010 05:51:18.0282 (UTC) FILETIME=[A4C056A0:01CB7408] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Frederic Weisbecker wrote: > On Fri, Aug 27, 2010 at 09:19:39PM +0800, DDD wrote: >> Peter Zijlstra wrote: >>> On Fri, 2010-08-27 at 20:21 +0800, DDD wrote: >>> >>>>>> Maybe the root cause was from kgdb/hw_breakpoint_layer, >>>>> Yeah, I think there's a bug in the hw_breakpoint stuff, does something >>>>> like the below fix it? >>>> Thanks for your patch, but I still could reproduce the problem with >>>> your patch. >>> Frederic, any clue as to what makes hw breakpoints go funny and have >>> last_period == 0? >> Hi Peter, >> >> Thanks for you take care of it, I have got the root cause of it now. >> >> It is the kgdb using hw_breakpoint_layer's API problem, and I have a RFC >> patch for it.(maybe it is not correctly), I will contact with Jason to >> fix this problem. >> >> Thank you very much, >> Dongdong > > > Thanks! > > We are waiting for your patch then. Hello Frederic, Sorry for delay, the patch have been accepted by Jason. http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c1bb9a9c1911036549c5cdfb23f32d7d20ffdc5a Dongdong