ULE crash

[Vallo Kallaste]

On Wed, Jun 25, 2003 at 06:20:33PM +0200, Ian Freislich <ianf at za.uu.net> wrote:

> About 4.5 minutes after rebooting with a SCHED_ULE kernel (I give
> ULE a go every few months), top started looking really wierd (the
> CPU % just kept on accumulating for each process). Before dnetc
> started, httpd showed 17% CPU, but the system was supposedly 100%
> idle at the time according to top.  Then dnetc started and things
> got wierd.
> 
> panic: page fault
> panic messages:
> ---
> Fatal trap 12: page fault while in kernel mode
> cpuid = 1; lapic.id = 01000000
> fault virtual address   = 0x38
> fault code              = supervisor read, page not present
> instruction pointer     = 0x8:0xc01e094d
> stack pointer           = 0x10:0xce772be4
> frame pointer           = 0x10:0xce772bf4
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, def32 1, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 603 (dnetc)
> trap number             = 12
> panic: page fault
> cpuid = 1; lapic.id = 01000000
> Stack backtrace:
> boot() called on cpu#1
> 
> syncing disks, buffers remaining... panic: absolutely cannot call smp_ipi_shootdown with interrupts already disabled
> cpuid = 1; lapic.id = 01000000
> boot() called on cpu#1
> Uptime: 4m15s
> Dumping 191 MB
> ata0: resetting devices ..
> done
>  16 32 48 64 80 96 112 128 144 160 176
> ---

I had the same panic last week after updating and had to disable
seti at home to get up in hurry. The last kernel (4BSD) ran fine for a
month with two seti processes running.
-- 
Vallo Kallaste