Re: [-rt BUG] scheduling with irqs disabled: swapper

[Steven Rostedt <rostedt@goodmis.org>]

On Sat, 2006-05-27 at 17:13 -0700, john stultz wrote:
> On Fri, 2006-05-26 at 21:14 -0400, Steven Rostedt wrote:
> > On Fri, 2006-05-26 at 15:53 -0700, john stultz wrote:
> > > Hey Ingo, All,
> > > 	We had the following bug reported on bootup on one of our boxes (it
> > > was a 4way I believe) running -rt22. So far it seems to be a one-off
> > > but I figured I'd post it to see if anyone had a clue.
> > 
> > I'm assuming this is a i386.  Also I'm assuming that frame pointers was
> > not compiled in since the stack is a little suspicious.
> > 
> > Anyway, could you show the /proc/interrupts of this machine.  I'm
> > curious if the i8042 isn't sharing an interrupt with something with
> > NODELAY in it.
> 
> Here ya go:
>             CPU0       CPU1       CPU2       CPU3
>    0:       8796    3868607        275     531673  IO-APIC-edge   [........N/  0]  pit
>    2:          0          0          0          0  XT-PIC         [........N/  0]  cascade
>    3:          5        620          2        229  IO-APIC-edge   [........./ 63]  serial
>    8:          0          1          0          0  IO-APIC-edge   [........./  0]  rtc
>   11:          0          0          0          0  IO-APIC-edge   [........./  0]  acpi
>   19:        120          0          0          1  IO-APIC-level  [........./  0]  ohci_hcd:usb1, ohci_hcd:usb2
>   24:         57          9          5      46795  IO-APIC-level  [........./  0]  eth0
>   26:       1396      14537          0        702  IO-APIC-level  [........./  0]  ioc0
>  NMI:          0          0          0          0
>  LOC:    6907796    4419008    4415669    4413513
>  ERR:          0
>  MIS:          0

Thanks, but I was looking more into the code, and I'm wondering...
Does this machine have "irqfixup" or "irqpoll" set in the kernel command
line?

I think that -rt doesn't support it yet.  That is, it can call a handler
from interrupt context, which should have been a thread.

Let me know if that was the case.

-- Steve


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