Re: fxp0: device timed out problem

At 05:53 PM 1/24/2005, you wrote:
>On Mon, 24 Jan 2005, Ganbold wrote:
>
>Any luck with disabling ACPI?  In particular, are the interrupt
>assignments substantially different between booting with ACPI and without?
>You can probably just diff -u the old dmesg.boot and the new one...

I didn't try disabling ACPI.

> > >Usually a device timed out error is related to interrupts from the device
> > >not being delivered, being delivered improperly, etc.  Does your dmesg
> > >contain any references to interrupt storms?  Once the above message has
> > >printed, do you see any further interrupts on the fxp interrupt source
> > >when checking intermittently with "systat -vmstat 1" or "vmstat -i"?
> >
> > I couldn't check the system by issuing those commands.  Following is the
> > dmesg output with debug.mpsafenet disabled:
>
>Couldn't as in, not possible for administrative reasons, because you
>couldn't log in once the failure occurred so couldn't get the output, or
>because they don't work, or...?  Just want to make sure I understand if
>this is an administrative issue or symptomatic.

Sorry for my poor explanation. Actually I didn't try these commands.

> > I didn't do much investigation on those servers that time. However
> > without debug.mpsafenet, servers are working fine for more than 3 weeks.
>
>That is certainly suggestive -- I wonder if we're looking at a locking bug
>in fxp0 involving serialization with the hardware.  However, it's not
>conclusive, I think -- when running MPSAFE, the timing is quite different
>on UP as well as SMP hardware, which could trigger other existing bugs.
>The big open question, I think, is whether an interrupt delivery problem
>is involved.

Probably I have to enable debug.mpsafenet in one of the servers and experiment
disabling ACPI and checking interrupt source when device times out.
I will let you know.

thanks,

Ganbold


>Robert N M Watson
>
>
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