I'm no expert, but it looks like a kernel oops caused by an inability to handle a paging request, and it looks like tar was doing something when it happened. Did you check the system logs for what happened right before then? Were any cron jobs running?
Are you up-to-date with all your software? What distro/version are you running? Any unusual hardware? -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]