Re: un/shared IRQ problem (was: Re: 2.6.18 - another DWARF2)

[Martin Lorenz <martin@lorenz.eu.org>]

On Wed, Oct 18, 2006 at 11:26:03PM -0700, Andrew Morton wrote:
> On Wed, 18 Oct 2006 08:34:31 +0200
> Martin Lorenz <martin@lorenz.eu.org> wrote:
> 
> > On Tue, Oct 17, 2006 at 11:52:16AM -0700, Jesse Brandeburg wrote:
> > > On 10/16/06, Martin Lorenz <martin@lorenz.eu.org> wrote:
> > > >just got the following on resume:
> > > >
> > > >[87026.706000]  [<c0251745>] e1000_open+0xcd/0x1a4
> > > >[87026.714000] DWARF2 unwinder stuck at syscall_call+0x7/0xb
> > > >[87026.715000] Leftover inexact backtrace:
> > > >[87026.715000] e1000: eth0: e1000_request_irq: Unable to allocate interrupt
> > > >Error: -16
> > > 
> > > I'm pretty sure this isn't an e1000 problem.  you need to talk to
> > > whoever is maintaining the IRQ subsystem for x86.  E1000 is attempting
> > > to register a shared interrupt and someone has already registered that
> > > interrupt unshared.
> > 
> > interestingly though it always involves e1000 when I see dumps like this.
> > I already reported more of those :-)
> > this one dosen't seem to do any harm to system stability. it occurs on every
> > suspend/resume and I can circumvent it by disabling msi
> > 
> > > 
> > > looks like several devices are sharing IRQ 201 (aka GSI 16) and ahci
> > > or usb uhci_hcd is likely the problem, or the (acpi) power management
> > > subsystem.
> > > 
> > > Hope this helps get the right people involved.
> > 
> > thank you
> 
> Could we see the /proc/interrupts please, so we can find out where the
> clash is happening?


here you are

~# cat /proc/interrupts
           CPU0       CPU1
  0:   76521957    2009390    IO-APIC-edge  timer
  1:      39599          0    IO-APIC-edge  i8042
  8:        128          0    IO-APIC-edge  rtc
  9:     415044          0   IO-APIC-level  acpi
 12:     862451          0    IO-APIC-edge  i8042
 58:      68014     326850         PCI-MSI  libata
 66:     508910      17187   IO-APIC-level  sdhci:slot0, uhci_hcd:usb3
 74:    3156375          0   IO-APIC-level  uhci_hcd:usb2, ohci1394, HDA Intel
 82:     134828          0   IO-APIC-level  uhci_hcd:usb4, ehci_hcd:usb5
 90:      46548          0         PCI-MSI  eth0
201:     100133          0   IO-APIC-level  uhci_hcd:usb1, yenta, i915@pci:0000:00:02.0
NMI:          0          0
LOC:   78530935   78520308
ERR:          0
MIS:          0


gruss
  mlo
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Dipl.-Ing. Martin Lorenz

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