From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265545AbUEZMTO (ORCPT ); Wed, 26 May 2004 08:19:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265529AbUEZMRU (ORCPT ); Wed, 26 May 2004 08:17:20 -0400 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:17343 "EHLO fgwmail5.fujitsu.co.jp") by vger.kernel.org with ESMTP id S265537AbUEZMRC (ORCPT ); Wed, 26 May 2004 08:17:02 -0400 Date: Wed, 26 May 2004 21:17:03 +0900 From: AKIYAMA Nobuyuki Subject: Re: [PATCH] NMI trigger switch support for debugging In-reply-to: <20040525193721.7c71f61d.akpm@osdl.org> To: Andrew Morton Cc: linux-kernel@vger.kernel.org Message-id: <40B48ABF.80604@jp.fujitsu.com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii; format=flowed Content-transfer-encoding: 7bit X-Accept-Language: en-us, en User-Agent: Mozilla Thunderbird 0.6 (X11/20040516) References: <40B1BEAC.30500@jp.fujitsu.com> <20040524023453.7cf5ebc2.akpm@osdl.org> <40B3F484.4030405@jp.fujitsu.com> <20040525184148.613b3d6e.akpm@osdl.org> <40B400D1.1080602@jp.fujitsu.com> <20040525193721.7c71f61d.akpm@osdl.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi Andrew, Andrew Morton wrote: >AKIYAMA Nobuyuki wrote: > > >>Sorry, I resend document and patch. >> >> > >Great, thanks. Updates to Documentation/kernel-parameters.txt and >Documentation/filesystems/proc.txt would be nice. > > >If the machine locks up with interrupts enabled we can use sysrq-T and >sysrq-P. If it locks up with interrupts disabled the NMI watchdog will >automatically produce the same info as your patch. So what advantage does >the patch add? > > People who think performance is very important and want to run only program they need tend not to use NMI watchdog. My patch does not affect performance at all, and it just run when NMI switch is pressed. Whenever debugging information is needed, we can always get it. Regards, Nobuyuki Akiyama