lkml.org 
[lkml]   [2004]   [Oct]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.5.2

* Mark_H_Johnson@raytheon.com <Mark_H_Johnson@raytheon.com> wrote:

> The critical section nesting was "unique" and looks like
>
> | preempt count: 00010005 ]
> | 5-level deep critical section nesting:
> ----------------------------------------
> .. [<c03257cf>] .... _spin_lock+0x1f/0x70
> .....[<c01e217a>] .. ( <= __up_write+0x26a/0x2a0)
> .. [<c03257cf>] .... _spin_lock+0x1f/0x70
> .....[<c01e1f65>] .. ( <= __up_write+0x55/0x2a0)
> .. [<c0325817>] .... _spin_lock+0x67/0x70
> .....[<c011b54d>] .. ( <= task_rq_lock+0x3d/0x70)
> .. [<c03257cf>] .... _spin_lock+0x1f/0x70
> .....[<c0115f47>] .. ( <= nmi_watchdog_tick+0x127/0x140)
> .. [<c013d5bd>] .... print_traces+0x1d/0x60
> .....[<c0105bec>] .. ( <= show_regs+0x14c/0x174)

this might as well have been the NMI watchdog interacting. Could you
turn off the NMI watchdog to see whether that stabilizes things?

> The script then exits with preempt count of 3 and an atomic counter
> underflow BUG message. This is followed right after with
>
> BUG: Unable to handle kernel NULL pointer dereference at virtual address
> 00000
> 020

these are then probably just followup-errors. Will take a look at the
logs.

Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:07    [W:0.419 / U:0.064 seconds]
©2003-2011 Jasper Spaans. Advertise on this site