Interrupt storm with 7.0

Jan Henrik Sylvester me at
Mon Apr 14 09:49:05 UTC 2008

lysergius2001 wrote:
> Recently installed 7.0-RELEASE on an i386 as upgrade from 6.3-RELEASE and
> now have a continuous interrupt storm on IRQ17.  This is a shared IRQ for
> ath0 and echi0.  Never saw this on 6.3??? Any suggestions?

Just another contribution to the collection of interrupt storms maybe 
related to ath:

Whenever I plug in my ath1 on cardbus0, I get exactly one storm:
interrupt storm detected on "irq10:"; throttling interrupt source

ath1: <Atheros 5212> mem 0xd0220000-0xd022ffff irq 10 at device 0.0 on 

Anyhow, I am not sure, if it is really ath causing this. During boot, I 
get one storm, too, that is on irq 10, but my ath0 on pci2 is on irq 9:

ath0: <Atheros 5212> mem 0xd0200000-0xd020ffff irq 9 at device 4.0 on pci2
interrupt storm detected on "irq10:"; throttling interrupt source

I do not get interrupt storms on irq 9 and I have already had that storm 
before I replaced my minipci iwi0 with ath0:

The reply to that posting was that it is probably related to USB:

Moreover, I have a bunch of other devices sharing irq 10:

vgapci0: <VGA-compatible display> port 0x3000-0x30ff mem 
0xd8000000-0xdfffffff,0xd0100000-0xd010ffff irq 10 at device 0.0 on pci1
uhci0: <Intel 82801DB (ICH4) USB controller USB-A> port 0x1800-0x181f 
irq 10 at device 29.0 on pci0
uhci2: <Intel 82801DB (ICH4) USB controller USB-C> port 0x1840-0x185f 
irq 10 at device 29.2 on pci0
ehci0: <Intel 82801DB/L/M (ICH4) USB 2.0 controller> mem 
0xd0000000-0xd00003ff irq 10 at device 29.7 on pci0
fwohci0: <Texas Instruments TSB43AB21/A/AI/A-EP> mem 
0xd0218000-0xd02187ff,0xd0210000-0xd0213fff irq 10 at device 7.0 on pci2
pcm0: <Intel ICH4 (82801DB)> port 0x1c00-0x1cff,0x18c0-0x18ff mem 
0xd0000c00-0xd0000dff,0xd0000800-0xd00008ff irq 10 at device 31.5 on pci0

On our problematic irq, we both have got echi0. Thus, the second storm I 
get upon attaching ath1 might not be directly caused by ath.

No suggestions, just more data.

Jan Henrik

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