Re: BUGs in 2.6.12-rc2-RT-V0.7.45-01

[William Weston <weston@sysex.net>]

On Fri, 15 Apr 2005, Ingo Molnar wrote:

> * William Weston <weston@sysex.net> wrote:
> 
> > On Wed, 13 Apr 2005, Ingo Molnar wrote:
> > 
> > > what are you using kprobes for? Do you get lockups even if you disable 
> > > kprobes?
> > 
> > Various processes will lockup on the P4/HT system, usually while under 
> > some load.  The processes cannot be killed.  X will lockup once or 
> > twice a day (which means my console, and thus sysrq, are toast), but I 
> > can still ssh in.  Nothing is logged by the kernel.  Are there any 
> > post-lockup forensics that can be performed before I reboot?
> 
> could you try the -44-03 patch:
> 
>  http://redhat.com/~mingo/realtime-preempt/older/realtime-preempt-2.6.12-rc2-V0.7.44-03
> 
> this doesnt have the plist changes yet. Is this one more stable?

With 2.6.12-rc2-V0.7.44-03, the P4/HT box has been stable all day.  I'm 
seeing another BUG on boot, not kprobes related this time:

Freeing unused kernel memory: 192k freed
logips2pp: Detected unknown logitech mouse model 86
input: ImExPS/2 Logitech Explorer Mouse on isa0060/serio1
BUG: kstopmachine:1054 RT task yield()-ing!
 [<c0103dba>] dump_stack+0x23/0x25 (20)
 [<c030ff1f>] yield+0x67/0x69 (20)
 [<c0142a44>] stop_machine+0xa4/0x15e (40)
 [<c0142b2d>] do_stop+0x15/0x77 (20)
 [<c0132c5b>] kthread+0xab/0xd3 (48)
 [<c0100fe9>] kernel_thread_helper+0x5/0xb (563617812)
---------------------------
| preempt count: 00000001 ]
| 1-level deep critical section nesting:
----------------------------------------
.. [<c013bca6>] .... print_traces+0x1b/0x52
.....[<c0103dba>] ..   ( <= dump_stack+0x23/0x25)

ns83820.c: National Semiconductor DP83820 10/100/1000 driver.
eth0: ns83820.c: 0x22c: 49001186, subsystem: 1186:4900
eth0: ns83820 v0.20: DP83820 v1.2: 00:50:ba:37:d4:bc io=0xff8ff000 irq=18 f=sg


I'm also seeing an unlikely wakeup time:

(               X-3581 |#1): new 2533412143 us maximum-latency wakeup.


Otherwise, this on seems very stable.


Best Regards,
--William Weston


--
/* William Weston <weston@sysex.net> */
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