[Bug 678882] New: Strange Kernel NMI messages
https://bugzilla.novell.com/show_bug.cgi?id=678882 https://bugzilla.novell.com/show_bug.cgi?id=678882#c0 Summary: Strange Kernel NMI messages Classification: openSUSE Product: openSUSE 11.4 Version: Final Platform: Other OS/Version: Other Status: NEW Severity: Normal Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: joschibrauchle@gmx.de QAContact: qa@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.127 Safari/534.16 Once in a while, while working on my brand new Os11.4 machine (2.6.37.1-1.2-desktop), I received the following kernel messages: kernel:[ 4811.322957] Uhhuh. NMI received for unknown reason 30 on CPU 0. kernel:[ 4811.322971] Do you have a strange power saving mode enabled? kernel:[ 4811.322976] Dazed and confused, but trying to continue Is there anything to do about this? I don't see any problems aside from this message currently. Reproducible: Couldn't Reproduce Steps to Reproduce: 1. 2. 3. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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--- Comment #1 from Joschi Brauchle
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--- Comment #1 from Joschi Brauchle
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Joschi Brauchle
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Joschi Brauchle
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Jiri Slaby
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Jiri Slaby
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Jiri Slaby
kernel:[ 4811.322957] Uhhuh. NMI received for unknown reason 30 on CPU 0. kernel:[ 4811.322971] Do you have a strange power saving mode enabled? kernel:[ 4811.322976] Dazed and confused, but trying to continue
Is there anything to do about this? I don't see any problems aside from this message currently.
Hmm, hard to say as nobody seems to announce he is the source of the NMI. 0x30 are just timer statuses. Could you investigate whether this happens when you are doing some specific task. E.g. downloading with wifi/NIC or doing high rate memory transfers (some computations etc.) or similar? Or if it is just random. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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--- Comment #6 from Joschi Brauchle
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--- Comment #7 from Joschi Brauchle
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--- Comment #8 from Joschi Brauchle
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--- Comment #9 from Joschi Brauchle
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Jiri Slaby
May this have something to do with it? You mentioned that the NMI reasons are "timer" related...?
Hmm, I wouldn't say so. Another theory is NMI IPIs which are not expected. I'll build a test kernel to dump the last per-cpu generate-NMI timestamp. Don't forget to remove needinfo flag. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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Jiri Slaby
Hmm, I wouldn't say so. Another theory is NMI IPIs which are not expected. I'll build a test kernel to dump the last per-cpu generate-NMI timestamp.
Or not, maybe later. NMIs are generated by perf events and also by the NMI watchdog. You don't have perf event enabled. But anyway, could you boot with "nowatchdog nmi_watchdog=0" kernel parameters? Also if this is reasonably easy to reproduce, could you try kernel:head? http://download.opensuse.org/repositories/Kernel:/HEAD/openSUSE_11.4/ -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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Jiri Slaby
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Jiri Slaby
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--- Comment #14 from Jiri Slaby
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--- Comment #15 from Jiri Slaby
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--- Comment #16 from Jiri Slaby
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