On Wed, 3 Aug 2005, Craig O'Keefe wrote:
> Is anyone aware of a limit to the number of telnet sessions UML can
> support. We are seeing our >60 never come up. Does anyone know of where
> this is configured?

Each telnet-rlogin-ssh session requires a pseudo-tty master+slave, and a 
2.4.x kernel for desktop use will generally be configured with 64 pttys.  
Try rebuilding your kernel with 128 or 256 pttys, depending on your ability 
to support the resulting user activity.

There's more than one ptty implementation and the more modern ones 
can allocate arbitrarily many (subject to memory limits), so you may only 
have to ensure that you have more than 64 /dev/pty?? - /dev/tty?? inodes 
pre-created.  Unless you're using the /dev/pts directory (filesystem type 
"devpts"), in which inodes will be created and deleted as needed.  The 
whole can of worms is a little complicated.

James F. Carter          Voice 310 825 2897    FAX 310 206 6673
UCLA-Mathnet;  6115 MSA; 405 Hilgard Ave.; Los Angeles, CA, USA  90095-1555
Email: [EMAIL PROTECTED]    http://www.math.ucla.edu/~jimc (q.v. for PGP key)


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