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Date:      Tue, 27 May 2008 13:49:20 -0700
From:      Julian Elischer <julian@elischer.org>
To:        Marcel Moolenaar <xcllnt@mac.com>
Cc:        Ed Schouten <ed@80386.nl>, current@FreeBSD.org, arch@FreeBSD.org, Poul-Henning Kamp <phk@phk.freebsd.dk>, Robert Watson <rwatson@FreeBSD.org>, Ade Lovett <ade@FreeBSD.org>, net@FreeBSD.org, "Bruce M. Simpson" <bms@FreeBSD.org>
Subject:   Re: HEAD UP: non-MPSAFE network drivers to be disabled
Message-ID:  <483C73D0.8060709@elischer.org>
In-Reply-To: <260F636A-8F72-411B-AED9-B029E1964003@mac.com>
References:  <51989.1211875439@critter.freebsd.dk> <483BC27C.6010102@elischer.org> <5229B4D7-40F0-4D45-93F1-244FA05E0304@mac.com> <483C49DC.3080108@elischer.org> <260F636A-8F72-411B-AED9-B029E1964003@mac.com>

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Marcel Moolenaar wrote:
> 
> On May 27, 2008, at 10:50 AM, Julian Elischer wrote:
> 
>> Marcel Moolenaar wrote:
>>> On May 27, 2008, at 1:12 AM, Julian Elischer wrote:
>>>> judging by the bug reports when things get broken there are still a
>>>> lot of people connected to the internet via dial up lines in places
>>>> off the beaten track, and still a lot of people who when travelling
>>>> do use dialup still. Some of these also use mpd. I can not say how 
>>>> many plan to keep using this in the future but it may be that the 
>>>> simplest answer is a completely separate sio driver that
>>>> just has netgraph hooks. I haven't talked with Ed yet but there
>>>> may be may ways to solve this problem.
>>> Take a look at uart(4). It has been designed to allow different
>>> kernel interfaces. It currently supports TTYs and keyboards. It
>>> should not be too hard to have it hook into netgraph.
>>> FYI,
>>
>>
>> While this is a good idea on it's own, the difference between
>> what that achieves and what a line discipline achieves is that
>> a line disciplin is hardware independent and can even be used
>> on a virtual device.
> 
> True, but you said:
> "... the simplest answer is a completely separate sio driver...".
> 
> This, besides not being true, is just as hardware dependent as
> uart(4) is. It seems to me that you've conveniently changed the
> subject to match your point of view :-)


yep :-)

we need to decide if the aim is to support just serial
ports or any 'tty'.






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