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

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Message-ID: <CA+8MBbJ4Tu86jSbaBRjDKfowwVE12jY3efK7QMm74e7i8aq4Hg@mail.gmail.com>
Date:	Thu, 1 Dec 2011 15:01:26 -0800
From:	Tony Luck <tony.luck@...el.com>
To:	Jiri Slaby <jslaby@...e.cz>
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

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?

-Tony
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