linux-kernel - Re: non-printable characters in /proc/interrupts

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Message-Id: <201106110038.43139.toralf.foerster@gmx.de>
Date:	Sat, 11 Jun 2011 00:38:42 +0200
From:	Toralf Förster <toralf.foerster@....de>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: non-printable characters in /proc/interrupts


Randy Dunlap wrote at 18:11:32
> On Fri, 10 Jun 2011 10:40:19 +0200 Toralf Förster wrote:
> > I've wondering about this entry at my ThinkPad T400 (kernel 2.6.39.1):
> > 
> > n22 ~ # grep 47: /proc/interrupts
> > 
> >  47:      44041      69740   PCI-MSI-edge      l▒��@�E�
> > 
> > I attached the output of
> > $>grep 47: /proc/interrupts > /tmp/int47
> > onto this email, the complete table looks like this :
> > 
> > n22 ~ # cat /proc/interrupts
> > 
> >            CPU0       CPU1
> >   
> >   0:     605293      71393   IO-APIC-edge      timer
> >   1:      13432          4   IO-APIC-edge      i8042
> >   8:         55         64   IO-APIC-edge      rtc0
> >   9:       6248        509   IO-APIC-fasteoi   acpi
> >  
> >  12:       1389         72   IO-APIC-edge      i8042
> >  16:          0          0   IO-APIC-fasteoi   uhci_hcd:usb6
> >  17:          0          0   IO-APIC-fasteoi   uhci_hcd:usb7
> >  18:          0          0   IO-APIC-fasteoi   uhci_hcd:usb8
> >  19:          0          0   IO-APIC-fasteoi   ehci_hcd:usb2
> >  20:      52881          0   IO-APIC-fasteoi   uhci_hcd:usb3
> >  21:        329         37   IO-APIC-fasteoi   uhci_hcd:usb4
> >  22:          0          0   IO-APIC-fasteoi   uhci_hcd:usb5
> >  23:      30046       8743   IO-APIC-fasteoi   ehci_hcd:usb1
> >  40:          0          0   PCI-MSI-edge      PCIe PME
> >  41:          0          0   PCI-MSI-edge      PCIe PME
> >  42:          0          0   PCI-MSI-edge      PCIe PME
> >  43:          0          0   PCI-MSI-edge      PCIe PME
> >  44:     484163      55698   PCI-MSI-edge      ahci
> >  45:        750       1809   PCI-MSI-edge      eth0
> >  46:         94        213   PCI-MSI-edge      hda_intel
> >  47:      44399      70713   PCI-MSI-edge      l▒��@�E�
> >  48:      71969     102457   PCI-MSI-edge      iwlagn
> > 
> > NMI:          0          0   Non-maskable interrupts
> > LOC:   10167789   10321319   Local timer interrupts
> > SPU:          0          0   Spurious interrupts
> > PMI:          0          0   Performance monitoring interrupts
> > IWI:        213        200   IRQ work interrupts
> > RES:     289390     333102   Rescheduling interrupts
> > CAL:       4677       4542   Function call interrupts
> > TLB:      22261      16007   TLB shootdowns
> > TRM:          0          0   Thermal event interrupts
> > THR:          0          0   Threshold APIC interrupts
> > MCE:          0          0   Machine check exceptions
> > MCP:         41         41   Machine check polls
> > ERR:          0
> > MIS:          0
> 
> Is there any other info (like dmesg or boot log) that tells what
> device/driver uses interrupt 47 ?

00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio 
Controller (rev 03)
        Subsystem: Lenovo Device 20f2
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- 
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin B routed to IRQ 47
        Region 0: Memory at fc020000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: HDA Intel
        Kernel modules: snd-hda-intel

I attached the dmesg output

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

View attachment "dmesg.txt" of type "text/plain" (48317 bytes)