Re: 2.6.14-rc3-rt2

[Mark Knecht <markknecht@gmail.com>]

On 10/5/05, Ingo Molnar <mingo@elte.hu> wrote:
>
> * Mark Knecht <markknecht@gmail.com> wrote:
>
> > On 10/4/05, Thomas Gleixner <tglx@linutronix.de> wrote:
> > > On Tue, 2005-10-04 at 11:58 -0700, Mark Knecht wrote:
> > > > > I guess its related to the priority leak I'm tracking down right now.
> > > > > Can you please set following config options and check if you get a bug
> > > > > similar to this ?
> > > > >
> > > > > BUG: init/1: leaked RT prio 98 (116)?
> > > > >
> > > > > Steven, it goes away when deadlock detection is enabled. Any pointers
> > >
> > > Thats actually a red hering caused by asymetric accounting which only
> > > happens when
> > >
> > > CONFIG_DEBUG_PREEMPT=y
> > > and
> > > # CONFIG_RT_DEADLOCK_DETECT is not set
> >
> > OK. I'll keep testing then.
> >
> > Are you asking me to apply the code you sent or is that for someone
> > else?
>
> could you try the -rt8 kernel, with the same .config that previously
> produced those messages - do the messages still occur?
>
>         Ingo
>

Hi Ingo,
   By the time I go there it was already -rt9. Unfortunately I still
get the same message. Possibly the continued discussion is addressing
this? I haven't tried to read it all yet.

>From dmesg:

PCI: Using configuration type 1
PCI: Using MMCONFIG at e0000000
ACPI: Subsystem revision 20050902
BUG: swapper/1: spin-unlock irq flags assymetry?

Call Trace:<ffffffff80400d19>{_spin_unlock_irqrestore+89}
<ffffffff802694d6>{acpi_ev_create_gpe_block+642}
       <ffffffff80263116>{acpi_os_wait_semaphore+135}
<ffffffff80269682>{acpi_ev_gpe_initialize+109}
       <ffffffff80266cac>{acpi_ev_initialize_events+151}
<ffffffff802790a2>{acpi_enable_subsystem+69}
       <ffffffff806086de>{acpi_init+86} <ffffffff80604cda>{init_bio+266}
       <ffffffff8010b25a>{init+506} <ffffffff8010ed16>{child_rip+8}
       <ffffffff8010b060>{init+0} <ffffffff8010ed0e>{child_rip+0}

---------------------------
| preempt count: 00000000 ]
| 0-level deep critical section nesting:
----------------------------------------

WARNING: swapper/1 changed soft IRQ-flags.

Call Trace:<ffffffff8015336a>{local_irq_enable+26}
<ffffffff80400d25>{_spin_unlock_irqrestore+101}
       <ffffffff802694d6>{acpi_ev_create_gpe_block+642}
<ffffffff80263116>{acpi_os_wait_semaphore+135}
       <ffffffff80269682>{acpi_ev_gpe_initialize+109}
<ffffffff80266cac>{acpi_ev_initialize_events+151}
       <ffffffff802790a2>{acpi_enable_subsystem+69}
<ffffffff806086de>{acpi_init+86}
       <ffffffff80604cda>{init_bio+266} <ffffffff8010b25a>{init+506}
       <ffffffff8010ed16>{child_rip+8} <ffffffff8010b060>{init+0}
       <ffffffff8010ed0e>{child_rip+0}
---------------------------
| preempt count: 00000000 ]
| 0-level deep critical section nesting:
----------------------------------------

ACPI: Interpreter enabled
ACPI: Using IOAPIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (0000:00)
PCI: Probing PCI hardware (bus 00)
PCI: Transparent bridge - 0000:00:09.0

mark@lightning ~ $ uname -a
Linux lightning 2.6.14-rc3-rt9 #1 SMP PREEMPT Wed Oct 5 09:16:16 PDT
2005 x86_64 AMD Athlon(tm) 64 Processor 3000+ AuthenticAMD GNU/Linux
mark@lightning ~ $

   The previous -rt7 kernel, even with this message, has been the best
one I've tested so far on this machine, at least for my work load.
I'll test -rt9 more starting now and will watch this thread for any
instructions or requests.

   If you want or need my current config file let me know.

Cheers,
Mark