Re: [PATCH] serial/8250: Increase number of serial ports to 32

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On Wed, Nov 10, 2010 at 1:28 PM, Greg KH <greg@xxxxxxxxx> wrote:
> On Wed, Nov 10, 2010 at 01:10:51PM -0600, Matt Schulte wrote:
>> On Wed, Nov 10, 2010 at 10:08 AM, Greg KH <greg@xxxxxxxxx> wrote:
>> > On Wed, Nov 10, 2010 at 02:54:39PM +0100, Yegor Yefremov wrote:
>> >> This will make sure that multiple serial port cards can be
>> >> used out of the box. Otherwise the user must pass
>> >> nr_uarts parameter, that will be often forgotten and increases
>> >> support requests for serial card vendors.
>> >
>> > Has this really happened in the past? ?What is the downside of changing
>> > this option that has been around for many years now? ?Also note that
>> > multi-port serial cards are more rare these days than they used to be so
>> > changing this seems a bit pointless now.
>> >
>>
>> Multiport serial cards are not dead, we still sell bunches.  This is
>> one of those problems that really frustrates our customers.  They want
>> their ports to show up by default and the only way to do it is to
>> recompile the kernel or modify the boot line.  A lot of my customers
>> don't like the 82510.nr_uarts work around in grub and so we have to
>> hold their hands while they figure out how to recompile the kernel
>> with support for more ports.  I think the default number of ports
>> should definitely be changed from 4 to at least 8, maybe even 16 or
>> 32.
>
> Why not work with the distros to get it changed?  If we change the
> default within the kernel, it's still not going to change what they are
> using at all, so you will still be having the same problem you are
> today.

Don't you think changing it here would eventually propagate down the
chain to all of the distros?  Or do you think they would ignore the
change up here?

Matt Schulte
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