[LAU] hdsp not happy with recent kernels

[peter at peterlutek.com]

> On 09/15/2012 01:25 PM, peter at peterlutek.com wrote:

>> so, avoiding the irq conflict by unloading firewire modules doesn't solve
>> the problem. mrph.
> Argh, that seemed like a good lead...
> What does "cat /proc/interrupts" show? I think the interrupt count for
each cpu should increment. Does it?

for a kernel under which jack fails:
root at palnote:/home/plutek# cat /proc/interrupts
           CPU0       CPU1       CPU2       CPU3
  0:         43          0          0          0   IO-APIC-edge      timer
1:          9          0          0          0   IO-APIC-edge      i8042
8:          1          0          0          0   IO-APIC-edge      rtc0
9:        734          0          0          0   IO-APIC-fasteoi   acpi
 12:       2502          0          0          0   IO-APIC-edge      i8042
16:         28          0          0          0   IO-APIC-fasteoi   mmc0,
ehci_hcd:usb1
 17:          0          0          0          0   IO-APIC-fasteoi
rtlwifi
 19:          1          0          0          0   IO-APIC-fasteoi
firewire_ohci, snd_hdsp
 23:       1855          0          0          0   IO-APIC-fasteoi
ehci_hcd:usb2
 40:        939          0          0          0   PCI-MSI-edge      eth0
41:      14407          0          0          0   PCI-MSI-edge      ahci
42:        341          0          0          0   PCI-MSI-edge
snd_hda_intel
 43:       3975          0          0          0   PCI-MSI-edge      i915
NMI:         12          2         13          3   Non-maskable interrupts
LOC:      22030       9369      22762       8398   Local timer interrupts
SPU:          0          0          0          0   Spurious interrupts
PMI:         12          2         13          3   Performance monitoring
interrupts
IWI:          0          0          0          0   IRQ work interrupts
RES:       1012       1465       1348       1568   Rescheduling interrupts
CAL:        636        665        426        753   Function call
interrupts
TLB:        552        534        338        386   TLB shootdowns
TRM:          0          0          0          0   Thermal event
interrupts
THR:          0          0          0          0   Threshold APIC
interrupts
MCE:          0          0          0          0   Machine check
exceptions
MCP:         57         57         57         59   Machine check polls
ERR:          0
MIS:          0

and for the kernel under which jack runs fine:
root at palnote:/home/plutek# cat /proc/interrupts
           CPU0       CPU1       CPU2       CPU3
  0:        124          0          0          0   IO-APIC-edge      timer
  1:          8          0          0          0   IO-APIC-edge      i8042
  8:          1          0          0          0   IO-APIC-edge      rtc0
  9:        731          0          0          0   IO-APIC-fasteoi   acpi
 12:       2501          0          0          0   IO-APIC-edge      i8042
 16:        159          0          0          0   IO-APIC-fasteoi  
ehci_hcd:usb1, mmc0, mei
 17:          0          0          0          0   IO-APIC-fasteoi   rtlwifi
 19:          0          0          0          0   IO-APIC-fasteoi   snd_hdsp
 23:        484          0          0          0   IO-APIC-fasteoi  
ehci_hcd:usb2
 40:        240          0          0          0   PCI-MSI-edge      eth0
 41:          5          0          0          0   PCI-MSI-edge     
firewire_ohci
 42:      11334          0          0          0   PCI-MSI-edge      ahci
 43:        503          0          0          0   PCI-MSI-edge     
snd_hda_intel
 44:       2171          0          0          0   PCI-MSI-edge      i915
NMI:          0          0          0          0   Non-maskable interrupts
LOC:      18709      15972      13871      12078   Local timer interrupts
SPU:          0          0          0          0   Spurious interrupts
PMI:          0          0          0          0   Performance monitoring
interrupts
IWI:          0          0          0          0   IRQ work interrupts
RES:      12558       5658      12784      13897   Rescheduling interrupts
CAL:        162        195        300        249   Function call interrupts
TLB:        320        538        365        855   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0   Threshold APIC interrupts
MCE:          0          0          0          0   Machine check exceptions
MCP:          2          2          2          2   Machine check polls
ERR:          0
MIS:          0

not sure what you mean by "the interrupt count for each cpu should
increment", but i don't think i'm seeing anything that looks like that.

> Sorry, don't quite know where to go from here, looks like something for
kernel gurus in lkml...
> -- Fernando

well, we'll see if anything comes out of the above first.... i'm kinda
busy this week to engage a discussion with a bunch of kernel devs!

thanks again... cheers!
.pltk.