linux-kernel - Re: [PATCH] tty: Correct tty buffer flushing.

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Date:	Tue, 04 Dec 2012 14:11:27 +0400
From:	Ilya Zykov <ilya@...x.ru>
To:	Alan Cox <alan@...ux.intel.com>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Xiaobing Tu <xiaobing.tu@...el.com>,
	Jiri Slaby <jslaby@...e.cz>, Alek Du <alek.du@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH] tty: Correct tty buffer flushing.

On 04.12.2012 12:53, Alan Cox wrote:
>> Main idea here -  we never flash last (struct tty_buffer) in the
>> active buffer. Only data for ldisc. (tty->buf.head->read =
>> tty->buf.head->commit). At that moment driver can collect(write) data
>> in buffer without conflict.
> 
> This one I agree with (sorry it took a while to get to, I wanted to sit
> and think carefully about it as it is subtle and clever)
> 
> Can you generate a single patch which reverts the unneeded locks and
> adds this instead. Add a Signed-off-by and send it to Greg to get it
> into 3.8/3.9 somewhere.
> 
> Thanks
> 
> Alan
> 

OK.
Thank you.

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