Re: PROBLEM: BUG and system dies if cat /proc/tty/driver/serial while console on ttyS0

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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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