Date: Fri, 12 Nov 2010 17:26:39 +0400 From: "Rakhesh Sasidharan" <freebsd@rakhesh.net> To: freebsd-questions@freebsd.org Subject: FreeBSD crashed - trying to find out why Message-ID: <1289568399.7673.1404953861@webmail.messagingengine.com>
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Hello, I have a FreeBSD 8.1-RELEASE machine running inside a KVM VPS. I installed tmux a few days back, and today I was trying to update all my ports via portupgrade. Everything was going fine, so after a while I detached from the tmux session and disconnected from the machine (was connected via SSH). When I returned a few hours later, I see that the machine had rebooted. It appears that the machine rebooted due to a kernel fault. From the timestamps I see that the machine rebooted some 10-15 minutes before I returned, so it looks like portupgrade and tmux etc were working fine until then. Here's the messages from /var/log/messages - -8<--- kernel: Fatal trap 12: page fault while in kernel mode kernel: cpuid = 0; apic id = 00 kernel: fault virtual address = 0x250 kernel: fault code = supervisor read data, page not present kernel: instruction pointer = 0x20:0xffffffff8052e574 kernel: stack pointer = 0x28:0xffffff800019c8a0 kernel: frame pointer = 0x28:0xffffff800019c8c0 kernel: code segment = base 0x0, limit 0xfffff, type 0x1b kernel: = DPL 0, pres 1, long 1, def32 0, gran 1 kernel: processor eflags = interrupt enabled, resume, IOPL = 0 kernel: current process = 50496 (tmux) kernel: trap number = 12 kernel: panic: page fault kernel: cpuid = 0 kernel: Uptime: 3d22h30m42s kernel: Cannot dump. Device not defined or unavailable. kernel: Automatic reboot in 15 seconds - press a key on the console to abort -8<--- I went into all the background about tmux above since the logs highlight tmux as the currently running process. Any idea why kernel crashed, or what I can do to prevent this in future? I understand from the forums that this could be due to bad memory or bad hard disk, but I was wondering whether this could also be due to any incompatibilities with KVM (triggered by tmux perhaps). Thanks, Rakhesh
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