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Subject2.4.21-pre4: tg3 driver problems with shared interrupts
Hello Dave, Jeff, all

I just started experiments with a new setup consisting of:

00:00.0 Host bridge: ServerWorks CNB20HE Host Bridge (rev 23)
00:00.1 Host bridge: ServerWorks CNB20HE Host Bridge (rev 01)
00:00.2 Host bridge: ServerWorks: Unknown device 0006 (rev 01)
00:00.3 Host bridge: ServerWorks: Unknown device 0006 (rev 01)
00:02.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 0d)
00:03.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 0d)
00:04.0 Network controller: Elsa AG QuickStep 1000 (rev 01)
00:05.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 07)
00:05.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 07)
00:07.0 VGA compatible controller: ATI Technologies Inc Rage XL (rev 27)
00:0f.0 ISA bridge: ServerWorks CSB5 South Bridge (rev 93)
00:0f.1 IDE interface: ServerWorks CSB5 IDE Controller (rev 93)
00:0f.2 USB Controller: ServerWorks OSB4/CSB5 USB Controller (rev 05)
00:0f.3 Host bridge: ServerWorks: Unknown device 0225
01:02.0 Unknown mass storage controller: Promise Technology, Inc. 20268 (rev
01)
01:04.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5701 Gigabit
Ethernet (rev 15)
02:02.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5701 Gigabit
Ethernet (rev 15)
02:03.0 SCSI storage controller: Adaptec AIC-7899P U160/m (rev 01)
02:03.1 SCSI storage controller: Adaptec AIC-7899P U160/m (rev 01)

I found out within minutes that this setup does not survive if you let the
Broadcom cards share interrupts with anything else. It works ok now like
this (eth2 is tg3):

CPU0
0: 343269 XT-PIC timer
1: 6804 XT-PIC keyboard
2: 0 XT-PIC cascade
5: 37952 XT-PIC EMU10K1
7: 515 XT-PIC HiSax
9: 711212 XT-PIC aic7xxx, aic7xxx, eth0, eth1
10: 4710570 XT-PIC eth2
11: 639316 XT-PIC ide2, ide3
12: 107821 XT-PIC PS/2 Mouse
15: 69222 XT-PIC ide1
NMI: 0
LOC: 0
ERR: 0
MIS: 0

But horribly failed in such a setup:

0: XT-PIC timer
1: XT-PIC keyboard
2: XT-PIC cascade
5: XT-PIC EMU10K1
7: XT-PIC HiSax
9: XT-PIC eth2, aic7xxx, aic7xxx, eth0, eth1, ide2, ide3
12: XT-PIC PS/2 Mouse
15: XT-PIC ide1

I cannot even produce a "cat /proc/interrupts" for this because I am not fast
enough at login (the network at eth2 is heavy loaded). I sometimes read about
problems here with tg3-drivers, and I just wanted to point you to the shared
case, maybe it has to do with this special case rather than with the drivers
internals itself.
(PS: its not the ide2-3, I checked that out)

--
Regards,
Stephan
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