On Wed, Oct 03, 2018 at 02:13:33PM -0600, Mike Larkin wrote:
> CVSROOT: /cvs
> Module name: src
> Changes by: mlar...@cvs.openbsd.org 2018/10/03 14:13:33
>
> Modified files:
> usr.sbin/vmd : ns8250.c
>
> Log message:
> vmd(8): avoid a divide by zero when the user specified a low baud rate
>
> Low baud rates would result in a 0 "rate limiter pause count" in the
> serial port output code. This pause counter is used to implement a
> delay in what otherwise is an instantaneous serial port output path, and
> is needed by some guest OS kernels. This fix only enables the rate
> limiter pause if the count is > 0 ("pause after 0 characters" makes no
> sense anyway).
>
> Note that this will result in skipping the limiter on unusually low
> baud rates, but since nobody is using a low baud rate console in vmd,
> I don't think this is going to be a problem.
>
> ok pd
With this commit my virtual machine prints single characters only
if I enter something at the console.
...
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (16c451c199802b57.a) swap on sd0b dump on sd0b
Kernel printing works fine. But then it gets stuck.
Automatic boot in progress: s
The userland messages are printed character by charater.
And I have to press space for each character.
I use "vmctl start v74 -c" to access the console.
If I backout this commit, it works again.
bluhm
