linux-kernel - Re: latest -git: hibernate: possible circular locking dependency detected

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Date:	Fri, 22 Aug 2008 21:09:15 +0200
From:	"Vegard Nossum" <vegard.nossum@...il.com>
To:	"Pavel Machek" <pavel@...e.cz>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Dmitry Adamushko" <dmitry.adamushko@...il.com>,
	"Max Krasnyanskiy" <maxk@...lcomm.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: latest -git: hibernate: possible circular locking dependency detected

On Fri, Aug 22, 2008 at 10:55 AM, Pavel Machek <pavel@...e.cz> wrote:
> Hi!
>
>
>> I just got this on v2.6.27-rc4 (+ unrelated fix):
>
> Did suspend ever work for you on this machine?

Yes, 2.6.20.9 works fine :-P

I am checking out your suggestions of IDE driver changes now.

(Next e-mail:)
>> I have no idea why this happens. Is it possible to trigger SysRq by
>> writing data on the other end of the serial console? (Maybe my cable
>> is bad or something, but data seems to be going in both directions
>> over my serial console.)
>
> Serial break translates to sysrq, IIRC.

Thanks, that's useful info.

I also figured out something else; apparently the ttys are set to
character echo mode in either or both directions. I guess this is why
I also get these "ttyS0: 3 input overrun(s)" messages all the time. Am
I the only one who experienced this? I'll experiment with stty.


Vegard

-- 
"The animistic metaphor of the bug that maliciously sneaked in while
the programmer was not looking is intellectually dishonest as it
disguises that the error is the programmer's own creation."
	-- E. W. Dijkstra, EWD1036
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