Kok, Auke wrote:
William Montgomery wrote:
Thanks for responding. I am very interested to find the source of
this problem.
Kok, Auke wrote:
William Montgomery wrote:
In an earlier post to the list I described a hard lockup condition
that occurs on linux kernels 2.4.22, 2.6.13, and 2.6.17 when using
a 4 port 10/100 fast ethernet card. The lockup is easily repeatable
and occurs on 2 out of 3 computers.
Further testing has revealed that the lockup can be prevented on all
computers by making sure the card is installed on the primary PCI bus.
If the card is installed in a slot on the secondary PCI bus (behind a
PCI to PCI bridge) the lockup occurs.
sounds like int-A/B/C/D routing issues
The strange thing is that all the ports on the card work fine for a
few minutes, then when some condition (as yet unknown) occurs the
system locks up hard. I am currently using a PCI bus analyzer to
capture bus activity just prior to the lockup to try and find out
what leads up to this condition.
are you running any form of irqbalance, either in-kernel (bad) or the
userspace (better) one?
No. This is a Pentium 4 - single core, 2.8GHz.
Are there any PCI tuning registers that I can tweak to get around
this problem? Any changes I could make to the e100 driver to fix
this?
this issue might be resolvable by quirking the bridgee chips and
adjusting any APIC where needed. Unfortunately I don't know much
about this but it's physically not possible from the e100 driver.
The special (non-intel) card that has these 4 ports onboard contains
a bridge chip itself which explains the issues. Even a BIOS issue
could be the cause here.
I am aware of the bridge chip on the card but not sure what you mean
when you say this explains the issues? I sure would like to figure
out a way around this.
irq routing in linux may not be the same as in windows. I have no idea
how to compare them either (dmesg will show the linux setup, but I
don't know how to retreive this info under linux).
Not sure how windows applies here; I only use Linux. The main data
point so far is that the card works fine when on the primary PCI bus but
locks up hard after a few minutes when installed in a slot behind a PCI
to PCI bridge. I can provide the dmesg info on Monday.
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