kernel panic 6.2-RELEASE SMP dual quad core
hi all, uname -a FreeBSD HOSTNAME 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Fri Jan 12 11:05:30 UTC 2007 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/SMP i386 running on dual quad core intel xeons with 4gb ram. my server has been rebooting quite a bit and stopped responding today. i found this on the console: Fatal trap: 12 page fault while in kernel mode cpuid = 5; apic id = 05 fault virtual address = 0x0 fault code = supervisor write, page not present instruction pointer = 0x20:0xc0880472 stack pointer = 0x28:0xe6ea9c8c code segment = base 0x0, limit 0xf, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = resume, IOPL = 0 current process = 12 (idle: cpu5) trap number = 12 panic: page fault cpuid = 5 uptime 24m41s cannot dump. no dump device specified i've configured the dump device and will follow the kernel debugging details in the handbook if it happens again but i thought i'd write in now in case the cause of the problem jumped out at anyone. i've run mprime for 24 hours, and memtest for 3 passes, and a script i wrote which just exhausts ram and CPU, then backs off and does it again which have been running for 24 hours. i've also just started running this: http://www.holm.cc/stress/ i noticed that the same "fatal trap 12" appeared during stress tests as listed here: http://people.freebsd.org/~pho/stress/log/cons224.html any help, guidance or information would be much appreciated. cheers iain ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: kernel panic 6.2-RELEASE SMP dual quad core
Iain Dooley wrote: hi all, uname -a FreeBSD HOSTNAME 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Fri Jan 12 11:05:30 UTC 2007 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/SMP i386 running on dual quad core intel xeons with 4gb ram. my server has been rebooting quite a bit and stopped responding today. i found this on the console: Fatal trap: 12 page fault while in kernel mode cpuid = 5; apic id = 05 fault virtual address = 0x0 fault code = supervisor write, page not present instruction pointer = 0x20:0xc0880472 stack pointer = 0x28:0xe6ea9c8c code segment = base 0x0, limit 0xf, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = resume, IOPL = 0 current process = 12 (idle: cpu5) trap number = 12 panic: page fault cpuid = 5 uptime 24m41s cannot dump. no dump device specified i've configured the dump device and will follow the kernel debugging details in the handbook if it happens again but i thought i'd write in now in case the cause of the problem jumped out at anyone. i've run mprime for 24 hours, and memtest for 3 passes, and a script i wrote which just exhausts ram and CPU, then backs off and does it again which have been running for 24 hours. i've also just started running this: http://www.holm.cc/stress/ i noticed that the same "fatal trap 12" appeared during stress tests as listed here: http://people.freebsd.org/~pho/stress/log/cons224.html any help, guidance or information would be much appreciated. What you have so far is close to meaningless. The "fault virtual address = 0x0" means little more than "somewhere in the kernel there was a null pointer dereference". The fact that it was the idle process is suspicious though, it suggests that hardware failure is a high probability. Please follow up with the backtrace if you want to pursue this further. Kris ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: kernel panic 6.2-RELEASE SMP dual quad core
uname -a FreeBSD HOSTNAME 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Fri Jan 12 11:05:30 UTC 2007 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/SMP i386 running on dual quad core intel xeons with 4gb ram. my server has been rebooting quite a bit and stopped responding today. i found this on the console: Fatal trap: 12 page fault while in kernel mode cpuid = 5; apic id = 05 fault virtual address = 0x0 fault code = supervisor write, page not present instruction pointer = 0x20:0xc0880472 stack pointer = 0x28:0xe6ea9c8c code segment = base 0x0, limit 0xf, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = resume, IOPL = 0 current process = 12 (idle: cpu5) trap number = 12 panic: page fault cpuid = 5 uptime 24m41s cannot dump. no dump device specified i've configured the dump device and will follow the kernel debugging details in the handbook if it happens again but i thought i'd write in now in case the cause of the problem jumped out at anyone. i've run mprime for 24 hours, and memtest for 3 passes, and a script i wrote which just exhausts ram and CPU, then backs off and does it again which have been running for 24 hours. i've also just started running this: http://www.holm.cc/stress/ i noticed that the same "fatal trap 12" appeared during stress tests as listed here: http://people.freebsd.org/~pho/stress/log/cons224.html any help, guidance or information would be much appreciated. What you have so far is close to meaningless. The "fault virtual address = 0x0" means little more than "somewhere in the kernel there was a null pointer dereference". The fact that it was the idle process is suspicious though, it suggests that hardware failure is a high probability. Please follow up with the backtrace if you want to pursue this further. I thought that dodgy ram was the culprit. I've run memtest86 on three passes with no errrors reported although I've also read numerous reports on the net of memtest86 not being very effective. can you suggest a good method of stress testing ram? this is a new machine and still under warranty so if it's a ram issue I can easily just get it replaced. Cheers, Iain ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: kernel panic 6.2-RELEASE SMP dual quad core
Iain Dooley wrote: > hi all, > > uname -a > FreeBSD HOSTNAME 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Fri Jan 12 11:05:30 > UTC 2007 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/SMP i386 > > running on dual quad core intel xeons with 4gb ram. Are you using PAE? (probably not if this is the generic SMP configuration). > Fatal trap: 12 page fault while in kernel mode This only means an equivalent of "segmentation fault" for user-mode programs. The actual problem can be anything. > current process = 12 (idle: cpu5) This is important. The "idle" process does literary nothing and is highly unlikely to contain a bug. Does this mean that the problem only appears when the system is idle? > i've run mprime for 24 hours, and memtest for 3 passes, and a script i > wrote which just exhausts ram and CPU, then backs off and does it again > which have been running for 24 hours. Do your tests stress multiple CPUs? If not, this may be something to try. Also try disabling CPUs to see if it makes any difference. By the way, you are likely not to get any performance benefits (and some performance regressions are likely) with this number of CPUs on FreeBSD 6.2, except if you intend to do CPU-intensive tasks (like scientific caluclations). If you can, try the latest release candidate of 7.0. signature.asc Description: OpenPGP digital signature
Re: kernel panic 6.2-RELEASE SMP dual quad core
hi ivan, uname -a FreeBSD HOSTNAME 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Fri Jan 12 11:05:30 UTC 2007 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/SMP i386 running on dual quad core intel xeons with 4gb ram. Are you using PAE? (probably not if this is the generic SMP configuration). no, i checked and i'm not using PAE. current process = 12 (idle: cpu5) This is important. The "idle" process does literary nothing and is highly unlikely to contain a bug. Does this mean that the problem only appears when the system is idle? hmm maybe i should leave the system idle and see if it crashes again :) i've been running an application which just loads up RAM with lots of processes keeping at least 32 processes running at all times. each script is killed when it uses too much space. the machine hasn't crashed again for like 2 days. i'm going away so i might leave it idle for that time and see if it crashes again. i've got a dump device setup this time which will give me more information to send into the list. By the way, you are likely not to get any performance benefits (and some performance regressions are likely) with this number of CPUs on FreeBSD 6.2, except if you intend to do CPU-intensive tasks (like scientific caluclations). If you can, try the latest release candidate of 7.0. i'm just running a web application on it. it's a total pain though. i should have just bought a late model second hand p4 or something rather than a state of the art machine. i'm too out of touch with modern hardware to have known what i was getting myself into. live and learn i guess. cheers iain ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: kernel panic 6.2-RELEASE SMP dual quad core
Iain Dooley wrote: > i'm just running a web application on it. it's a total pain though. i > should have just bought a late model second hand p4 or something rather > than a state of the art machine. i'm too out of touch with modern > hardware to have known what i was getting myself into. live and learn i > guess. Quad core Xeons are not exactly unusual or significantly different nowadays. I and many other people have been running them with FreeBSD without problems almost since they were made. signature.asc Description: OpenPGP digital signature
