[intrepid] kern.log flooded with messages

[Jakub Nowacki]

Binary package hint: linux-image-2.6.27-7-server

Messages are also visible in files: message and syslog. The message that apears most of the time is:

Oct 25 15:41:26 newdumolap kernel: [24956.587898] =======================
Oct 25 15:41:26 newdumolap kernel: [24956.588328] bad: scheduling from the idle thread!
Oct 25 15:41:26 newdumolap kernel: [24956.588330] Pid: 0, comm: swapper Tainted: P 2.6.27-7-server #1
Oct 25 15:41:26 newdumolap kernel: [24956.588332] [<c038a196>] ? printk+0x1d/0x1f
Oct 25 15:41:26 newdumolap kernel: [24956.588336] [<c012a20a>] dequeue_task_idle+0x2a/0x40
Oct 25 15:41:26 newdumolap kernel: [24956.588339] [<c01286ff>] dequeue_task+0xcf/0x130
Oct 25 15:41:26 newdumolap kernel: [24956.588342] [<c01287aa>] deactivate_task+0x1a/0x30
Oct 25 15:41:26 newdumolap kernel: [24956.588345] [<c038a7b3>] schedule+0x4b3/0x790
Oct 25 15:41:26 newdumolap kernel: [24956.588348] [<c0154e4b>] ? sched_clock_tick+0x7b/0xb0
Oct 25 15:41:26 newdumolap kernel: [24956.588352] [<c015b82c>] ? tick_nohz_stop_idle+0x5c/0x70
Oct 25 15:41:26 newdumolap kernel: [24956.588355] [<c015b875>] ? tick_nohz_restart_sched_tick+0x35/0x180
Oct 25 15:41:26 newdumolap kernel: [24956.588359] [<c01088cd>] cpu_idle+0xbd/0x140
Oct 25 15:41:26 newdumolap kernel: [24956.588362] [<c037c323>] rest_init+0x53/0x60

The fuddling starts suddenly and nothing specific happens apart from that after some time there isn't any space lest on the root file system. I'm not a kernel expert but it seems to be associated with the scheduler. It occured before, then stoped after some updates (probably after updates just the problem didn't occur) then today (I had to reboot because it continuously logged the messages ant the files where growing rapidly.

If any other information are needed I have the whole logs (maybe not whole just 25MB out of 900...) and I can post more of it.

[Jakub Nowacki (j-s-nowacki)]

Affects generic image as well. Frankly, the bug started to occur annoyingly often (3 times yesterday, 1 time today). I used hardy for some time with this machine as well (a month or so and I'm Ubuntu and Linux in general everyday user) and I haven't seen it before (this sort of a bug).

[Chris Coulson (chrisccoulson)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 286285, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.