insn_read in var/messages - AJA Video KONA SD?

From: Paul Weaver (usenet_at_isorox.co.uk)
Date: 09/28/05 

Date: 27 Sep 2005 22:27:15 -0700

I've got a machine with an AJA Video KONA SD SDI out card, outputs some
rendered video.

This video is occasionally jerky, I'm thinking memory issues as vmstat
shows high swap use when the display is jerky, however
/var/log/messages, /var/syslog, dmesg, puts the following out:

Sep 28 05:21:54 localhost kernel: imb[0]: 0x0
Sep 28 05:21:54 localhost kernel: insn_read!
Sep 28 05:21:54 localhost kernel: imb[0]: 0x0

4 or 5 times a second when the card it outputting. When the card isn't
outputting the messages aren't there.

As I understand it, insn_read is used in some drivers, but that's about
the limit of my knowlege.

Does anyone have any ideas? Is it something to worry about or
ignorable?

The machine is based arround Mandrake 10.

lspci:
0b:03.0 Multimedia video controller: AJA Video KONA SD SMPTE 259M I/O
        Subsystem: AJA Video KONA SD SMPTE 259M I/O
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping+ SERR+ FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium
>TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 66
        Interrupt: pin A routed to IRQ 48
        Region 0: Memory at f3000000 (32-bit, non-prefetchable)
[size=4K]
        Region 1: Memory at f0000000 (32-bit, prefetchable) [size=16M]

/proc/pci:
  Bus 11, device 3, function 0:
    Multimedia video controller: AJA Video KONA SD SMPTE 259M I/O (rev
0).
      IRQ 48.
      Master Capable. Latency=66.
      Non-prefetchable 32 bit memory at 0xf3000000 [0xf3000fff].
      Prefetchable 32 bit memory at 0xf0000000 [0xf0ffffff].

lsmod:
Module Size Used by Tainted: P
floppy 56440 0 (autoclean)
nls_cp437 5116 0 (autoclean)
nls_iso8859-1 3516 0 (autoclean)
smbfs 46576 0 (autoclean)
pclicom 54788 0
pci1760 3614 0
amcc_s5933 3720 0 [pci1760]
comedi 23296 0 [pci1760]
KSD 141336 0
rfcomm 37664 0 (autoclean)
l2cap 21164 2 (autoclean) [rfcomm]
bluez 39780 1 (autoclean) [rfcomm l2cap]
snd-seq-oss 30624 0
snd-seq-midi-event 6528 0 [snd-seq-oss]
snd-seq 47888 2 [snd-seq-oss snd-seq-midi-event]
snd-pcm-oss 43300 0 (unused)
snd-mixer-oss 14288 0 [snd-pcm-oss]
snd-intel8x0 23240 0
snd-ac97-codec 52812 0 [snd-intel8x0]
snd-mpu401-uart 5116 0 [snd-intel8x0]
snd-rawmidi 18208 0 [snd-mpu401-uart]
snd-seq-device 5668 0 [snd-seq-oss snd-seq snd-rawmidi]
gameport 3412 0 [snd-intel8x0]
snd-pcm 84068 0 [snd-pcm-oss snd-intel8x0]
snd-timer 19812 0 [snd-seq snd-pcm]
snd-page-alloc 9460 0 [snd-intel8x0 snd-pcm]
snd 46340 0 [snd-seq-oss snd-seq-midi-event
snd-seq snd-pcm-oss snd-mixer-oss snd-intel8x0 snd-ac97-codec
snd-mpu401-uart snd-rawmidi snd-seq-device snd-pcm snd-timer]
soundcore 6884 0 [snd]
nfsd 76656 8 (autoclean)
af_packet 15720 0 (autoclean)
e1000 75108 1 (autoclean)
ide-cd 32740 0
cdrom 34048 0 [ide-cd]
ohci1394 28304 0 (unused)
loop 13780 0 (unused)
aes 31808 0 [loop]
supermount 85120 1 (autoclean)
joydev 6752 0
nvidia 3859324 6
sbp2 19956 0 (unused)
ieee1394 206148 0 [ohci1394 sbp2]
mptscsih 39412 0
mptbase 42752 3 [mptscsih]
scsi_mod 111140 1 [sbp2 mptscsih]
keybdev 2596 0 (unused)
mousedev 5368 0 (unused)
hid 24164 0 (unused)
input 6080 0 [joydev keybdev mousedev hid]
ehci-hcd 20268 0 (unused)
usb-uhci 26032 0 (unused)
usbcore 78380 1 [hid ehci-hcd usb-uhci]
rtc 9676 0 (autoclean)
ext3 63216 2
jbd 42856 2 [ext3]

uname -a
Linux localhost 2.4.27-0.pre2.1mdksmp #1 SMP Fri Jun 4 03:25:07 CEST
2004 i686 Intel(R) Xeon(TM) CPU 3.40GHz unknown GNU/Linux

/proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.40GHz
stepping : 1
cpu MHz : 3400.227
cache size : 1024 KB
physical id : 0
siblings : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
pni monitor ds_cpl tm2 cid
runqueue : 0

bogomips : 6789.52

processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.40GHz
stepping : 1
cpu MHz : 3400.227
cache size : 1024 KB
physical id : 0
siblings : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
pni monitor ds_cpl tm2 cid
runqueue : 1

bogomips : 6789.52