linux-kernel - Re: [PATCH v2 1/6] TTY: serial, remove BTM from wait_until

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Message-ID: <20110810180754.GB13832@bombe-desk.opditex>
Date:	Wed, 10 Aug 2011 20:07:54 +0200
From:	Andreas Bombe <aeb@...ian.org>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	Jiri Slaby <jslaby@...e.cz>, gregkh@...e.de,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	Alan Cox <alan@...ux.intel.com>, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v2 1/6] TTY: serial, remove BTM from wait_until_sent

On Wed, Aug 10, 2011 at 04:43:19PM +0200, Jiri Slaby wrote:
> On 08/10/2011 03:09 AM, Andreas Bombe wrote:
> > I did my simple test on ttyS0 again: "stty -F /dev/ttyS0 crtscts" then
> > "echo >/dev/ttyS0". I attached the gzipped sysrq-t list in case you need
> > the complete output. This is just the process while it is trying to
> > close the device (bash's internal echo):
> 
> Hmm, perhaps obvious question. What is the port connected with? And with
> what cable? Is it null modem cable? Or at least with DTR-CTS connected?

Nothing is connected. After all, the whole point of this exercise is to
give the driver data to send which it can't get out so I can see whether
it blocks all tty operations system wide while trying to do the flush on
close.

-- 
Andreas Bombe
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