Re: [patch] Real-Time Preemption, -RT-2.6.10-rc3-mm1-V0.7.33-0

[Fernando Lopez-Lezcano]

On Tue, 2004-12-14 at 15:21, Fernando Lopez-Lezcano wrote:
> On Tue, 2004-12-14 at 05:28, Ingo Molnar wrote:
> > i have released the -V0.7.33-0 Real-Time Preemption patch, which can be
> > downloaded from the usual place:
> > 
> >   http://redhat.com/~mingo/realtime-preempt/
> > 
> > this is mainly a port from -rc2-mm3 to -rc3-mm1. Changes:
> > 
> > - due to 2.6.10 release work the -mm kernel now is in fixes-mostly mode,
> >   but there's one interesting new feature: -rc3-mm1 introduced the
> >   ->unlocked_ioctl method which is now an official way to do BKL-less
> >   ioctls. I changed the ALSA ->ioctl_bkl changes in -RT to use this
> >   facility. The ALSA/sound guys might be interested in these bits. Thus
> >   another chunk of -RT could go upstream.
> > 
> > - IO-APIC/MSI fix from Steven Rostedt.
> > 
> > - fixed a tracer bug which would produce a kernel warning and an empty
> >   /proc/latency_trace if the trace buffer overflows.
> 
> I don't know which change did it, but I have network connectivity in my
> athlon64 test box with 0.7.33-0! Woohoo! [*]

But I'm still having problems with a dual athlon mp machine while trying
to boot 0.7.33-04 (same as before - this has not booted for quite a
while with the realtime patches). This is what I see:

pnp: 00:02: ioport range 0xe400-0xe4fe could not be reserved
BUG: scheduling while atomic: swapper/0x10000000/1
caller is preempt_schedule_irq+0x34/0x50
 [<c021053c3>] dump_stack+0x23/-x30 (20)
 [<c037438c>] __schedule+0xd5c/0xdb0 (124)
 [<c037432b>] preempt_schedul_irq+0x34/0x50 (12)
 [<c010432b>] need_resched+0x20/0x29 (-7416)
---------------------------
| preempt count: 10000001 ]
| 1-level deep critical section nesting:
---------------------------------------
.. [<c01472ed>] .... print_traces+0x1d/0x60
.....[<c01053c3>] .. ( <= dump_stack+0x23/0x30)

BUG at kernel/latency.c:1292!
--------------------[ cut here ]---------------------
kernel BUG at kernel/latency.c:1292!
invalid operand: 0000 [#1]
PREEMPT_SMP

=================
Booting with:
hardirq_preempt=0
softirq_preempt=0

ide1 at 0x170-0x177,0x376 on irq 15
BUG: scheduling while atomic: swapper/0x10000000/1
caller is preempt_schedule_irq+0x34/0x50
 [<>] dump_stack=0x23/0x30 (20)
 [<>] __schedule+0x5dc/0xdb0 (124)
 [<>] preempt_sched_irq+0x34/0x50 (12)
 [<>] need_resched+0x20/0x29 (-7376)
---------------------------
| preempt count: 10000001 ]
| 1-level deep critical section nesting:
---------------------------------------
.. [<c01472ed>] .... print_traces+0x1d/0x60
.....[<c01053c3>] .. ( <= dump_stack+0x23/0x30)

BUG at kernel/latency.c:1292!
--------------------[ cut here ]---------------------
kernel BUG at kernel/latency.c:1292!
invalid operand: 0000 [#1]
PREEMPT_SMP

=============
Booting with:
acpi=off

usbcore: registered new driver hub
BUG scheduling while atomic: swapper......
....
kernel BUG at kernel/latency.c:1292!
invalid operand: 0000 [#1]
PREEMPT_SMP

========
hardirq_preempt=0
softirq_preempt=0
acpi=off

usbcore: registered new driver hub
BUG scheduling while atomic: swapper......
....
kernel BUG at kernel/latency.c:1292!
invalid operand: 0000 [#1]
PREEMPT_SMP

=============
Booting with:
hardirq_preempt=0
softirq_preempt=0
kernel_preempt=0
acpi=off

Same........
Suggestions?
-- Fernando


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