From owner-svn-src-head@FreeBSD.ORG  Sat Aug  1 22:15:09 2009
Return-Path: <owner-svn-src-head@FreeBSD.ORG>
Delivered-To: svn-src-head@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id E18EC1065674;
	Sat,  1 Aug 2009 22:15:09 +0000 (UTC)
	(envelope-from rwatson@FreeBSD.org)
Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42])
	by mx1.freebsd.org (Postfix) with ESMTP id B8D288FC12;
	Sat,  1 Aug 2009 22:15:09 +0000 (UTC)
	(envelope-from rwatson@FreeBSD.org)
Received: from fledge.watson.org (fledge.watson.org [65.122.17.41])
	by cyrus.watson.org (Postfix) with ESMTPS id 6E97B46B03;
	Sat,  1 Aug 2009 18:15:09 -0400 (EDT)
Date: Sat, 1 Aug 2009 23:15:09 +0100 (BST)
From: Robert Watson <rwatson@FreeBSD.org>
X-X-Sender: robert@fledge.watson.org
To: Hans Petter Selasky <hselasky@c2i.net>
In-Reply-To: <200908010615.02972.hselasky@c2i.net>
Message-ID: <alpine.BSF.2.00.0908012313500.1507@fledge.watson.org>
References: <200907300014.n6U0EZ77086341@svn.freebsd.org>
	<d04e16b70907310045y635245efob33b10464c22524f@mail.gmail.com>
	<20090731212140.GK47463@elvis.mu.org>
	<200908010615.02972.hselasky@c2i.net>
User-Agent: Alpine 2.00 (BSF 1167 2008-08-23)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
	Alfred Perlstein <alfred@freebsd.org>,
	src-committers@freebsd.org, Navdeep Parhar <nparhar@gmail.com>
Subject: Re: svn commit: r195960 - in head/sys/dev/usb: . controller input
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
	<svn-src-head.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
	<mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
	<mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 01 Aug 2009 22:15:10 -0000


On Sat, 1 Aug 2009, Hans Petter Selasky wrote:

>>> This has slowed down core dumps very significantly.  What used to take 
>>> 10-15s on my system now takes around 3 minutes.  A simple test is to break 
>>> into ddb and "call doadump" with or without this rev.  I have a serial 
>>> console on this machine and so I can use ddb whether the attached USB 
>>> keyboard works or not.
>
> It's because there is a DELAY(1000) in the UKBD's polling routine so that 
> key- repeating will work, no magic.

Given a choice between dumping 10x faster and having automatic key repeat in 
DDB, I'd lean towards the former.  :-)

Robert N M Watson
Computer Laboratory
University of Cambridge