Interrupt storm

[Mike Tancsa]

At 01:35 PM 29/03/2005, Jung-uk Kim wrote:
>On Tuesday 29 March 2005 01:22 pm, Dan Cojocar wrote:
> > Hello all,
> >
> > I noticed the following interrupt storm in my dmesg:
>
>Try this:
>
>http://docs.freebsd.org/cgi/mid.cgi?200503161154.04555.jkim
>
>Jung-uk Kim


Odd timing, as I came across a different Interrupt storm issue on a box 
that we just migrated to RELENG_5.  The machine has a 3ware card in it, so 
we had the IDE controllers disabled in the BIOS.  However, on bootup

Mar 29 12:45:26 new-dw2 kernel: Interrupt storm detected on "irq14: ata0"; 
throttling interrupt source

We rebooted to the BIOS, enabled the IDE controllers, and all was happy again.

With it "disabled" in the BIOS, it shows up as an ISA device ? Here is the 
before and after.


Mar 29 12:45:26 new-dw2 kernel: ata0 at port 0x3f6,0x1f0-0x1f7 irq 14 on isa0
Mar 29 12:45:26 new-dw2 kernel: ata1 at port 0x376,0x170-0x177 irq 15 on isa0
Mar 29 12:45:26 new-dw2 kernel: Interrupt storm detected on "irq14: ata0"; 
throttling interrupt source


Mar 29 12:53:29 new-dw2 kernel: atapci0: <Intel ICH4 UDMA100 controller> 
port 0xf000-0xf00f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 31.1 on pci0
Mar 29 12:53:29 new-dw2 kernel: ata0: channel #0 on atapci0
Mar 29 12:53:29 new-dw2 kernel: ata1: channel #1 on atapci0