more than one console

more than one console

[Sven Köhler]

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Hi,

i have been using UML (UserModeLinux) for quite some time. When i start
an UML-kernel, i can specify a driver for all the consoles. A "pts"
driver, a "null" driver etc.

I think, that this a thing, where Xen can learn from UML.

I would expect, that Xen allows domU to open as many consoles as it
wants (well, usually 6) and attach them to some host-device (well, pty,
pts or whatever - or even screen-sessions)

Actually, UML also distinguished between con0 and con1, con2, etc.
I think, the kernel writes all messages to con0, while the login-prompts
are opened on con1, con2, ... (con0, con1, etc. should correspond to
tty0, tty1, ...)

My proposed setup would be: log con0/tty0 to a logfile (there is no
login-prompt, so no need for input) and attach con1/tty1, con2/tty2, ...
to screen sessions or pty/pts-devices.


Long story short: Are there some plans, to "improve" xen's
console-handling within domU kernels?


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Re: more than one console

[Mark Williamson]

> Long story short: Are there some plans, to "improve" xen's
> console-handling within domU kernels?

AFAIK there are plans to allow both multiple "serial" consoles and multiple 
framebuffers in the future.  Multiple serial consoles have been on TODO lists 
for a long time, but nobody has yet been motivated enough to hack in support.

It oughtn't to be that hard to adapt the existing drivers to support multiple 
consoles per domain.

Cheers,
Mark

-- 
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