[opensuse] What do these kernel messages in syslog mean??
Listmates, On a phenom 9850, I found a few strange messages in my log file that I'm not familiar with. They seem to occur every few days or so. No set pattern. and nothing before of after that is related. The entry before was 3 hours earlier and the next entry after was 12 hours later. Here are the messages: Dec 5 01:00:38 ecstasy kernel: CPU0 attaching NULL sched-domain. Dec 5 01:00:38 ecstasy kernel: CPU1 attaching NULL sched-domain. Dec 5 01:00:38 ecstasy kernel: CPU2 attaching NULL sched-domain. Dec 5 01:00:38 ecstasy kernel: CPU3 attaching NULL sched-domain. Dec 5 01:00:38 ecstasy kernel: CPU0 attaching sched-domain: Dec 5 01:00:38 ecstasy kernel: domain 0: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,00000001 00000000,00000000,00000000,00000002 00000000,00000000,00000000,00000004 00000000,00000000,00000000,00000008 Dec 5 01:00:38 ecstasy kernel: domain 1: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: CPU1 attaching sched-domain: Dec 5 01:00:38 ecstasy kernel: domain 0: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,00000002 00000000,00000000,00000000,00000004 00000000,00000000,00000000,00000008 00000000,00000000,00000000,00000001 Dec 5 01:00:38 ecstasy kernel: domain 1: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: CPU2 attaching sched-domain: Dec 5 01:00:38 ecstasy kernel: domain 0: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,00000004 00000000,00000000,00000000,00000008 00000000,00000000,00000000,00000001 00000000,00000000,00000000,00000002 Dec 5 01:00:38 ecstasy kernel: domain 1: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: CPU3 attaching sched-domain: Dec 5 01:00:38 ecstasy kernel: domain 0: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,00000008 00000000,00000000,00000000,00000001 00000000,00000000,00000000,00000002 00000000,00000000,00000000,00000004 Dec 5 01:00:38 ecstasy kernel: domain 1: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,0000000f None since Dec 5. Any thoughts? -- David C. Rankin, J.D.,P.E. | openSoftware und SystemEntwicklung Rankin Law Firm, PLLC | Countdown for openSuSE 11.1 www.rankinlawfirm.com | http://counter.opensuse.org/11.1/small -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Thursday 11 December 2008, David C. Rankin wrote:
None since Dec 5. Any thoughts?
Hi David, I posted an almost exact similar question several days ago, but no reply. I guess no one knows. ;-) I am getting the same sched-domain messages in my logs as you, but more frequently. I haven't been able to find out much about them. Googling did turn up something about a bug in the CPU hotplug handling with a quad-core topology in kernel 2.6.25.16, but I don't know if it is still relevant, since I am on 2.6.25.18. The link is here: http://linux.derkeiler.com/Mailing-Lists/Kernel/2008-09/msg05013.html I don't know if that sheds any more light on matters for you. I'm still in the dark.... HTH, Joop
Joop Beris wrote:
On Thursday 11 December 2008, David C. Rankin wrote:
None since Dec 5. Any thoughts?
Hi David,
I posted an almost exact similar question several days ago, but no reply. I guess no one knows. ;-)
I am getting the same sched-domain messages in my logs as you, but more frequently. I haven't been able to find out much about them. Googling did turn up something about a bug in the CPU hotplug handling with a quad-core topology in kernel 2.6.25.16, but I don't know if it is still relevant, since I am on 2.6.25.18. The link is here: http://linux.derkeiler.com/Mailing-Lists/Kernel/2008-09/msg05013.html
I don't know if that sheds any more light on matters for you. I'm still in the dark....
HTH,
Joop
Ok, Let's bring in the big-gun directly. I'll this reply to super human kernel builder --> Jan. Jan, HELP! Quad Core Question, repost from the opensuse list below: On a phenom 9850, I found a few strange messages in my log file that I'm not familiar with. They seem to occur every few days or so. No set pattern. and nothing before of after that is related. The entry before was 3 hours earlier and the next entry after was 12 hours later. Here are the messages: Dec 5 01:00:38 ecstasy kernel: CPU0 attaching NULL sched-domain. Dec 5 01:00:38 ecstasy kernel: CPU1 attaching NULL sched-domain. Dec 5 01:00:38 ecstasy kernel: CPU2 attaching NULL sched-domain. Dec 5 01:00:38 ecstasy kernel: CPU3 attaching NULL sched-domain. Dec 5 01:00:38 ecstasy kernel: CPU0 attaching sched-domain: Dec 5 01:00:38 ecstasy kernel: domain 0: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,00000001 00000000,00000000,00000000,00000002 00000000,00000000,00000000,00000004 00000000,00000000,00000000,00000008 Dec 5 01:00:38 ecstasy kernel: domain 1: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: CPU1 attaching sched-domain: Dec 5 01:00:38 ecstasy kernel: domain 0: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,00000002 00000000,00000000,00000000,00000004 00000000,00000000,00000000,00000008 00000000,00000000,00000000,00000001 Dec 5 01:00:38 ecstasy kernel: domain 1: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: CPU2 attaching sched-domain: Dec 5 01:00:38 ecstasy kernel: domain 0: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,00000004 00000000,00000000,00000000,00000008 00000000,00000000,00000000,00000001 00000000,00000000,00000000,00000002 Dec 5 01:00:38 ecstasy kernel: domain 1: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: CPU3 attaching sched-domain: Dec 5 01:00:38 ecstasy kernel: domain 0: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,00000008 00000000,00000000,00000000,00000001 00000000,00000000,00000000,00000002 00000000,00000000,00000000,00000004 Dec 5 01:00:38 ecstasy kernel: domain 1: span 00000000,00000000,00000000,0000000f Dec 5 01:00:38 ecstasy kernel: groups: 00000000,00000000,00000000,0000000f None since Dec 5. What does the kernel guru make of it? -- David C. Rankin, J.D.,P.E. | openSoftware und SystemEntwicklung Rankin Law Firm, PLLC | Countdown for openSuSE 11.1 www.rankinlawfirm.com | http://counter.opensuse.org/11.1/small -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Joop Beris wrote:
On Thursday 11 December 2008, David C. Rankin wrote:
None since Dec 5. Any thoughts?
Hi David,
I posted an almost exact similar question several days ago, but no reply. I guess no one knows. ;-)
A quick grep through the kernel sources would have given you some more info: it's a debug message from some scheduler code in kernel/sched.c - it's only included when the kernel is configured with CONFIG_SCHED_DEBUG=y. This is one of the kernel hacking options - I don't know why the openSUSE kernel has it enabled by default. My guess is that you can safely ignore those messages unless you run into some scheduler problem :-) It also looks like earlier kernels (2.6.22.5-31) had these debug message disabled by default, whereas newer ones (e.g. 2.6.27.3) leave it up to the kernel config. /Per -- /Per Jessen, Zürich -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Thursday 11 December 2008, Per Jessen wrote:
A quick grep through the kernel sources would have given you some more info:
You're right, I didn't think of looking at the kernel source. Must be because I'm not a programmer. But of course you don't need to be a programmer to read the code comments. Another reason to use open source software: if you get strange messages in your logs, look them up in the source code! Thanks Per! Joop
participants (3)
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David C. Rankin -
Joop Beris -
Per Jessen