msk watchdog timeout

[John Baldwin]

On Monday 21 May 2007 12:45:39 am Li-Lun "Leland" Wang wrote:
> On 5/20/07, Pyun YongHyeon <pyunyh at gmail.com> wrote:
> > On Sun, May 20, 2007 at 09:39:54PM -0500, Li-Lun Leland Wang wrote:
> >  > On 5/20/07, Pyun YongHyeon <pyunyh at gmail.com> wrote:
> >  > >On Mon, May 21, 2007 at 01:41:24AM +0800, Li-Lun Wang (Leland Wang) 
wrote:
> >  > > > I just installed 7.0-current as of May 3 on my new computer that 
comes
> >  > > > with an on-board Marvell Yukon Gigabit Ethernet.  Every now and 
then
> >  > > > if the network throughput comes near several hundred kbytes, I get 
the
> >  > > > msk0 watchdog timeout messages:
> >  > > >
> >  > > >      kernel: msk0: watchdog timeout
> >  > > >      msk0: watchdog timeout (missed Tx interrupts) -- recovering
> >  > > >
> >  > > > Although it says recovering, the interface never comes back alive.
> >  > >
> >  > >The above message indicates the driver sent all pending transmission
> >  > >requests but the driver didn't receive corresponding Tx completion
> >  > >interrupts. Not recovering from the watchdog timeout means there are
> >  > >another issues on the driver. However as disabling MSI fixed the
> >  > >issue, I guess it's not fault of msk(4) and it comes from bad/broken
> >  > >MSI implementation of your system. I guess it's time to add your
> >  > >chipset to a PCI quirk table in order to blacklist it.
> >  >
> >  > I do reckon that MSI doesn't work on earlier Intel chipsets.  Mine is
> >  > P965 (on a gigabyte GA-965P-DS3 rev 1.3), which I suppose is recent
> >  > enough to support MSI, isn't it?  Or could there be other problems
> >
> > Using latest chipsets does not necessarily guarantee working MSI.
> 
> I see.  I think we should maybe add P965 to the PCI quirk list for
> broken MSI, then?

Possibly.
 
> >  > possible?
> >  >
> >
> > Yes. But I couldn't find possible issue on msk(4) yet.
> 
> Maybe I was not clear enough.  Could there be something else that
> causes MSI to not working correctly other than the chipset?  I was
> just wondering why I didn't see too many broken MSI reports if most
> Intel chipsets are broken.

If it's not the driver it would be the chipset.  We already don't use MSI on 
systems that don't support either PCI-X or PCI-express, so that implicitly 
blacklists most older Intel chipsets.  Do you have any other devices in your 
system that support MSI?  pciconf -lc output would be useful to look at.

-- 
John Baldwin