Messages in this thread | | | Date | Mon, 19 Apr 2004 23:54:50 +0200 | From | Willy TARREAU <> | Subject | Re: [BUG] e1000 fails on 2.4.26+bk with CONFIG_SMP=y |
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On Mon, Apr 19, 2004 at 05:42:47PM -0400, Joe Korty wrote: > On Mon, Apr 19, 2004 at 09:39:30PM +0200, Willy Tarreau wrote: > > On Mon, Apr 19, 2004 at 12:54:25PM -0400, Joe Korty wrote: > >> > >> Uniprocessor 2.4.26 works fine. > >> Uniprocessor 2.4.26 + local apic works fine. > >> Uniprocessor 2.4.26 + local apic + io apic fails. > > > > interesting. Unfortunately, I didn't have time to try on the machine I told > > you about last day. But right here, I have a dual athlon communicating > > with an alpha, both with e1000 (544) in 2.4.26. Since there's a PCI > > bridge on your quad, I wonder if the IOAPIC doesn't trigger an interrupt > > routing problem with bridges. Are all the ports unusable or do some of > > them work reliably in APIC mode ? > > I just verified that the Quad Ethernet board works with 2.6.5 SMP, so it > is unlikely to be a bridge or other hardware problem.
Sorry that was not what I meant. I meant that the 2.4.26 irq routing or I don't know what might experience difficulties due to the presence of a PCI bridge on this board, and potentially this one particularly. I once encountered such a problem in a desktop machine which would only see 3 out of the 4 ports on an adaptec quad board, depending on the PCI slot it was fit in ! It turned out to be a problem with region alignment or something like this which was not correctly forwarded through the bridge (bios bug or so at initialization).
> For 2.4.26, the Dell 650 has an Intel 82545EM Gigabit Ethernet Controller > soldered in, which also uses the e1000 driver, and that works fine, so > we know the 2.4.26 e1000 driver works with some of these Intel chips.
OK, same here.
> When the Quad board works, it negotiates down to 10 MBits/sec Half Duplex. > Not sure yet if this is what it is supposed to be doing in our environment.
I remember something like this not long ago. It was what ethtool reported, but the card was running either gigabit or a forced 100FDX without auto-neg on the other side, I don't remember. Can you try a simple 4-pairs cable between two ports on the quad to check what media is negociated ?
Also, can you cat /proc/interrupts with and without io/apic, and try without ACPI as Zwane suggested ?
Cheers, Willy
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