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From: Greg KH <gregkh@suse.de>
To: John Lumby <johnlumby@hotmail.com>
Cc: linux-serial@vger.kernel.org
Subject: Re: PROBLEM:  BUG and system dies if cat /proc/tty/driver/serial while console on ttyS0
Date: Wed, 15 Jun 2011 08:28:08 -0700	[thread overview]
Message-ID: <20110615152808.GA9928@suse.de> (raw)
In-Reply-To: <COL116-W65B54193A5784AAE0E1505A36B0@phx.gbl>

On Wed, Jun 15, 2011 at 11:08:51AM -0400, John Lumby wrote:
> 
> If I direct kernel console output to the serial port ttyS0
>  by grub kernel command line like so
>           kernel /vmlinuz-2.6.39-FLG ro root=/dev/sdb3 rootfstype=ext3 selinux=0 console=ttyS0,19200n8r console=tty0
> then console output appears at the other end of the ttyS0 as expected,  but then if I log in (on local tty1) and
> 
> cat /proc/tty/driver/serial
> 
> I get this  (on 2.6.39)
> 
> BUG:   sleeping function called from invalid context at arch/x86/mm/fault.c:1087
> and the system is dead.

This should be resolved in the next 2.6.39.y release, and should also be
fixed in the 3.0-rc3 kernel.  Can you verify that?

thanks,

greg k-h
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      reply	other threads:[~2011-06-15 15:29 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-06-15 15:08 PROBLEM: BUG and system dies if cat /proc/tty/driver/serial while console on ttyS0 John Lumby
2011-06-15 15:28 ` Greg KH [this message]

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