Unfortunately, we can't reboot this server since it's actively serving end users and that would require a change request. But your post did give me an idea that did work: I deleted /dev/vg_domino8...
Your problem may end up being fairly complex but fwiw webmin run on perl rather than php so I would make sure both perl and mod_perl are installed and restart the server.
If you would rather not modify syslog configuration for fear of losing other messages, since it's coming from the kernel you can use the loglevel kernel parameter at boot time (setting it to...
Depends on what you have configured. That's a tunable kernel parameter. You can see what you're currently configured at by cat'ing out the sysctl's value: