linux-kernel - Re: [PATCH 2/5] TTY: ldisc, move wait idle to caller

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Date:	Fri, 02 Dec 2011 09:21:12 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	Tony Luck <tony.luck@...el.com>
CC:	gregkh@...e.de, linux-kernel@...r.kernel.org, jirislaby@...il.com,
	Dave Young <hidave.darkstar@...il.com>,
	Dave Jones <davej@...hat.com>,
	Ben Hutchings <ben@...adent.org.uk>,
	Dmitriy Matrosov <sgf.dma@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, stable <stable@...nel.org>
Subject: Re: [PATCH 2/5] TTY: ldisc, move wait idle to caller

On 12/02/2011 12:01 AM, Tony Luck wrote:
> One of my systems (HP rx2620 - ia64) has started hanging during shutdown.
> Last messages on the serial console are:
> 
> Shutting down service (localfs) network  .  .  .  .  .  .  .  .  .   done
> Shutting down D-Bus daemon                                           done
> Running /etc/ini
> 
> and there it hangs forever in mid word (totally repeatable stops at "ini" every
> time).
> 
> git bisect blames:
> 
> commit 300420722e0734a4254f3b634e0f82664495d210
> Author: Jiri Slaby <jslaby@...e.cz>
> Date:   Wed Nov 16 16:27:08 2011 +0100
> 
>     TTY: ldisc, move wait idle to caller
> 
> [Though the following commit "TTY: ldisc, wait for ldisc infinitely in hangup"
>  sounds like it fits the symptoms]
> 
> Ideas?

Thanks. What distro and init do you use? Does the attached patch help?

-- 
js
suse labs

View attachment "0001-TTY-ldisc-don-t-wait-with-ldisc_mutex.patch" of type "text/x-patch" (1955 bytes)