Re: [PATCH] um/configs: don't use devtmpfs in defconfig

[Richard Weinberger <richard@nod.at>]

Am 16.07.2013 20:12, schrieb Ramkumar Ramachandra:
> Al Viro wrote:
>> As for the devices, they are *not* bogus.  RTFM, already.
>> Documentation/virtual/uml/UserModeLinux-HOWTO.txt, if you can't be bothered
>> to say git grep UML Documentation/ and find where it on your own.  The
>> relevant section is called "Setting up serial lines and consoles".
>> Seriously, it's not as if the documentation didn't exist or had been
>> hard to find...
> 
> Yes; I've been trying to decipher the con thing for some time now.
> 
>> FWIW, default config is rather annoying - 6 xterms spawned and associated
>> with /dev/tty[1-6].  con0=fd:0,fd:1 con=pts mentioned in the HOWTO would,
>> IMO, make for much saner default.
> 
> Leave aside the fact that I could not find the uml-utils upstream [1],

http://user-mode-linux.sourceforge.net/downloads.html

> and didn't have a /uml/port-helper to connect the xterms for a second;
> I didn't even understand what was supposed to happen.  Why do we spawn
> xterms, and attach to the host's /dev/tty*?  So far, I just used
> /dev/console inside my existing tmux session in urxvt, and it seems to
> work fine.
> 
>> No comments on systemd behaviour - take that with LP and his crowd.  They
>> may or may not be confused by /dev/tty1 not being a virtual console.
> 
> From my brief discussion with Lennart, he's just following what
> Documentation/devices.txt says: /dev/tty* are virtual consoles.  If um
> is making some sort of exception for good reason, I'm sure systemd can
> accommodate it.

/me wonders since when /dev/ttyS0 is a virtual console...

Thanks,
//richard