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Re: Linux problems



"Thomas Schmitt" <scdbackup@gmx.net> wrote:

> Joerg Schilling:
> > Alan Cox [...] with his answers to Mr. Bloch, he was correct,
> > but I did not see him writing this claim.
>
> That's what i understand from this statement by Alan Cox 
>   http://lkml.org/lkml/2007/3/31/175

OK, it seems that I forgot about the less important parts.

> I interpret this like:
> "Kids, manage this yourself, like the Terminalovski
>  brothers from the neighbor house did."
>
> Well, Dialup Terminalovski is an ageing web criminal now.
> Uucp Terminalovksi lost his job to the Internet.
> Kermit Terminalovski went back to showbiz.
>
> Do they really want us to end up like that ?!

Well, this kind of rant verifies that he has no clue.

The tty dial in/out problem is unrelated to the SCSI  / removable
media problem.

The tty problem has been solved more than 25 years ago.
There are two devices /dev/ttya & /dev/cua0
The dialout device cua0 is blocked as long as a dial in is active
and the dial in device is blocked as long as a dial out is active.

This is a simple task compared to what cdrecord does on UNIX.
There are only two programs with completely different tasks
for ttys. There are many different taks related to CD/DVD sersives.

> Joerg Schilling:
> > If he did really write that it is a Linux userland only problem,
> > he is of course wrong.
>
> This becomes evident by my failure to coordinate
> cdrskin and libblkid. Ted T'so is my witness that i
> did consider any known locking mechanism and that
> each of them failed to match our needs.
> Those needs are not exotic.

Forget usual locking mechanisms, they will all not work.


> I'm open to proposals. (Expect some counter arguments
> from my side but be assured that i hope to lose in
> my role as advocatus diavoli.)

You cannot find a solution for Linux as long as the related people 
are unwilling acept a solution.

As long as Linux implements 3 or more unrelated and unsynchronized paths 
to the same hardware it is impossible to even add the basic support that
works on Solaris sine a long time.

There are issues that are even not solved on Solaris but you cannot
solve them on Linux if the basics are impossible.

Jörg

-- 
 EMail:joerg@schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin
       js@cs.tu-berlin.de                (uni)  
       schilling@fokus.fraunhofer.de     (work) Blog: http://schily.blogspot.com/
 URL:  http://cdrecord.berlios.de/old/private/ ftp://ftp.berlios.de/pub/schily



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