From owner-freebsd-bugs@FreeBSD.ORG  Tue Dec 16 05:40:09 2008
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 02B16106564A
	for <freebsd-bugs@hub.freebsd.org>;
	Tue, 16 Dec 2008 05:40:09 +0000 (UTC)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
	[IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id E1B2B8FC12
	for <freebsd-bugs@hub.freebsd.org>;
	Tue, 16 Dec 2008 05:40:08 +0000 (UTC)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1])
	by freefall.freebsd.org (8.14.3/8.14.3) with ESMTP id mBG5e8VX064676
	for <freebsd-bugs@freefall.freebsd.org>; Tue, 16 Dec 2008 05:40:08 GMT
	(envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.14.3/8.14.3/Submit) id mBG5e8QM064669;
	Tue, 16 Dec 2008 05:40:08 GMT (envelope-from gnats)
Date: Tue, 16 Dec 2008 05:40:08 GMT
Message-Id: <200812160540.mBG5e8QM064669@freefall.freebsd.org>
To: freebsd-bugs@FreeBSD.org
From: Katsushi Kobayashi <ikob@ni.aist.go.jp>
Cc: 
Subject: Re: kern/118093: firewire bus reset hogs CPU,
	causing data to be lost
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: Katsushi Kobayashi <ikob@ni.aist.go.jp>
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 16 Dec 2008 05:40:09 -0000

The following reply was made to PR kern/118093; it has been noted by GNATS.

From: Katsushi Kobayashi <ikob@ni.aist.go.jp>
To: Dieter <freebsd@sopwith.solgatos.com>
Cc: freebsd-firewire@freebsd.org,
 freebsd-drivers@freebsd.org,
 bug-followup@freebsd.org
Subject: Re: kern/118093: firewire bus reset hogs CPU,	causing data to be lost
Date: Tue, 16 Dec 2008 14:17:10 +0900

 Hi, 
 
 I believe no side effect is anticipated the message.
 "side effect" includes locking i/o.
 
 ----
 Katsushi Kobayashi
 
 
 
 
 On 2008/12/15, at 4:30, Dieter wrote:
 
 > I found the source of this problem.  When a firewire bus resets,
 > the firewire driver prints a few lines to the console,
 > using printf(9) and device_printf(9).  I suspect that these are
 > running at splfw aka splimp, locking out other i/o.
 >
 > Commenting out the *printf() calls fixes the problem, but that
 > isn't a good solution.
 >
 > Would changing the *printf() calls to log(9) calls be safe?
 > ("safe" meaning other i/o doesn't get locked out)
 >
 > Ah, for the good old days when 19200 baud seemed fast...
 > _______________________________________________
 > freebsd-firewire@freebsd.org mailing list
 > http://lists.freebsd.org/mailman/listinfo/freebsd-firewire
 > To unsubscribe, send any mail to "freebsd-firewire-unsubscribe@freebsd.org"