From owner-freebsd-stable@FreeBSD.ORG  Thu Oct 19 23:43:42 2006
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
X-Original-To: freebsd-stable@freebsd.org
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 2DBFB16A407
	for <freebsd-stable@freebsd.org>; Thu, 19 Oct 2006 23:43:42 +0000 (UTC)
	(envelope-from kaakun@highway.ne.jp)
Received: from mx.highway.ne.jp (pip8.gate01.com [61.122.117.246])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 2D55843D6A
	for <freebsd-stable@freebsd.org>; Thu, 19 Oct 2006 23:43:39 +0000 (GMT)
	(envelope-from kaakun@highway.ne.jp)
Received: from [219.0.96.106] (helo=[192.168.11.21])
	by pop11.isp.us-com.jp with esmtp (Mail 4.20)
	id 1GahY1-0008Iy-0c; Fri, 20 Oct 2006 08:43:37 +0900
Message-ID: <45380D57.9040302@highway.ne.jp>
Date: Fri, 20 Oct 2006 08:42:15 +0900
From: Kazuaki ODA <kaakun@highway.ne.jp>
User-Agent: Thunderbird 1.5.0.7 (X11/20061019)
MIME-Version: 1.0
To: Kris Kennaway <kris@obsecurity.org>
References: <4538009D.6030400@highway.ne.jp>
	<20061019225256.GA38237@xor.obsecurity.org>
In-Reply-To: <20061019225256.GA38237@xor.obsecurity.org>
Content-Type: text/plain; charset=ISO-2022-JP
Content-Transfer-Encoding: 7bit
Cc: freebsd-stable@freebsd.org
Subject: Re: ps locks up on 6.2-PRERELEASE SMP
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 19 Oct 2006 23:43:42 -0000

Kris Kennaway wrote:
> On Fri, Oct 20, 2006 at 07:47:57AM +0900, Kazuaki ODA wrote:
>> Hi,
>>
>> I ran the following two scripts simultaneously on 6.2-PRERELEASE SMP box
>> (cvsup'ed today).
>>
>> ----------------------------------------
>> #!/bin/sh
>>
>> while true; do
>>         ls -lR / > ls_result.txt
>> done
>> ----------------------------------------
>>
>> ----------------------------------------
>> #!/bin/sh
>>
>> while true; do
>>         ls -lR / > ls_result2.txt
>> done
>> ----------------------------------------
>>
>> After a while (about 5 minutes), I suspended and killed the both, and
>> ran "ps".  As the result, "ps" locked up.  No response and no output.
>> To make matters worse, I could not login anymore...
>>
>> This is 100% reproducable on SMP, but no problem when using Non-SMP kernel.
> 
> What state is ps in?  Press ^T.  It's probably a devfs lockup, which
> should be fixed by changes yet to be merged.
> 
> Kris

I tried again.  But ^T, ^C and ^Z had no effect, ps was still locking..

Should I rebuild kernel with DDB option, and go into DDB to get more
information?


-- 
Kazuaki ODA