Messages in this thread | | | Date | Tue, 28 Jun 2005 08:54:46 -0700 (PDT) | From | Daniel Walker <> | Subject | Re: Real-Time Preemption, -RT-2.6.12-final-V0.7.50-24 |
| |
On Tue, 28 Jun 2005, Steven Rostedt wrote:
> > [Please CC Ingo Molnar on all RT kernel issues] > > On Mon, 27 Jun 2005, Daniel Walker wrote: > > > On Mon, 2005-06-27 at 12:01 -0700, Chuck Harding wrote: > > > What can be causing the following message to appear in dmesg and > > > how can I fix it? > > > > > > BUG: scheduling with irqs disabled: kapmd/0x00000000/46 > > > caller is schedule_timeout+0x51/0x9e > > > [<c02b3bc9>] schedule+0x96/0xf6 (8) > > > [<c02b43f7>] schedule_timeout+0x51/0x9e (28) > > > [<c01222ed>] process_timeout+0x0/0x5 (32) > > > [<c0112063>] apm_mainloop+0x7a/0x96 (24) > > > [<c0115e45>] default_wake_function+0x0/0x16 (12) > > > [<c0115e45>] default_wake_function+0x0/0x16 (32) > > > [<c0111485>] apm_driver_version+0x1c/0x38 (16) > > > [<c01126f7>] apm+0x0/0x289 (8) > > > [<c01127a6>] apm+0xaf/0x289 (8) > > > [<c010133c>] kernel_thread_helper+0x0/0xb (20) > > > [<c0101341>] kernel_thread_helper+0x5/0xb (4) > > > > > > This was also present in earlier final-V0.7.50 version I've tried > > > (since -00) I don't get hangs but that doesn't look like it should > > > be happening. Thanks. > > > > If you have PREEMPT_RT enabled, it looks like interrupts are hard > > disabled then there is a schedule_timeout() requested. You could try > > turning off power management and see if you still have problems. > > > > Although turning off apm works, this is a fix to the symptom and not a > cure. Has someone already taken a look at this code? Since > apm_bios_call_simple calls local_save_flags and afterwards > raw_lock_irq_restore is then called. Shouldn't that have been > raw_local_save_flags? > > That apm_bios_call_simple_asm also looks pretty scary! I haven't yet > figured out how APM_FUNC_VERSION becomes a normal function.
I looked at them briefly.. It looks like there is some raw and non-raw mixed usage .
Daniel
- 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/
| |