Bug#440807: increase CONFIG_SERIAL_8250_NR_UARTS (number of serial ports)

[Lukasz Szybalski <lszybalski@uniqueinsuranceco.com>]

maximilian attems wrote:
> On Wed, Jan 09, 2008 at 09:42:15AM -0600, Lukasz Szybalski wrote:
>   
> > maximilian attems wrote:
> >     
> > > $  egrep NR_UARTS /boot/config-2.6.24-rc7-amd64  
> > > CONFIG_SERIAL_8250_NR_UARTS=16
> > >
> > > $  egrep RUNTIME_UARTS /boot/config-2.6.24-rc7-amd64  
> > > CONFIG_SERIAL_8250_RUNTIME_UARTS=4
> > >
> > > This can be overridden with the module parameter "nr_uarts", or
> > > boot-time parameter 8250.nr_uarts.
> > >
> > > up to 16 evidently
> > >
> > >  
> > >       
> > Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
> >
> > I edited /boot/grub/menu.lst and change the following lines by adding 
> > the 8250.nr_uarts=16 at the end of kernel option.
> >
> > title Debian GNU/Linux,
> > kernel 2.6.18-5-686 root (hd0,1)
> > kernel /boot/vmlinuz-2.6.18-5-686 root=/dev/sda2 ro 8250.nr_uarts=16
> > initrd /boot/initrd.img-2.6.18-5-686
> > savedefault
> >     
>
> that is _not_ the recommended way.
> add the bootparam to koopt and run update-grub.
> your setting above will be overwritten soon.
>   
soon, as in in the next kernel upgrade or?
>  
>   
> > Now I've got:
> > Serial: 8250/16550 driver $Revision: 1.90 $ 16 ports, IRQ sharing enabled
> >
> > Just for the my info. Is there a setting I could pass on boot time to 
> > increase the max number of serial ports and then set my 8250.nr_uarts=16 
> > to let say 20.
> >     
>
> you start greeedy, the first question was to get 9 devices,
> currently no.
>
>   
Since the limit is 16 then why not go 16. Could you tell me the proper 
exact way I should run the command. My knowledge on the kernel 
parameters is limited.

I run it as root on a command line?
bootparam 8250.nr_uarts=16 ??
or?

Thanks,
Lucas