IRQ usage for PCI devices, Kernel 2.4.4

IRQ usage for PCI devices, Kernel 2.4.4

[Joachim Backes]

Hi,

sometimes the following messages appear in /var/log/messages:

        May 13 14:24:41 sunny kernel: PCI: Found IRQ 10 for device 00:0e.0
        May 13 14:24:41 sunny kernel: PCI: The same IRQ used for device 00:0a.0

"0e" is my PCI sound card, and "0a" is my PCI ethernet card. The messages apppear in
the following environment: I send from another linux machine (per ssh) a command
wich plays some sound on my sound card, therefore the eth0 event and the sound
event occur at almost the same time.

Question: Can I ignore these messages, or is there any buggy behaviour?

Regards


Joachim Backes

--

Joachim Backes <backes@rhrk.uni-kl.de>       | Univ. of Kaiserslautern
Computer Center, High Performance Computing  | Phone: +49-631-205-2438 
D-67653 Kaiserslautern, PO Box 3049, Germany | Fax:   +49-631-205-3056 
---------------------------------------------+------------------------
WWW: http://hlrwm.rhrk.uni-kl.de/home/staff/backes.html  

RE: IRQ usage for PCI devices, Kernel 2.4.4

[Khachaturov, Vassilii]

If your PCI devices advertised they don't mind sharing the IRQs with each
other, ignore it if they're really capable of it. Otherwise, you'll probably
have to force one of the drivers and/or the bios to make them use separate
ones.

> -----Original Message-----
> From: Joachim Backes [mailto:backes@rhrk.uni-kl.de]
> Sent: Wednesday, May 16, 2001 1:46 AM
> To: LINUX Kernel
> Subject: IRQ usage for PCI devices, Kernel 2.4.4
> 
> 
> Hi,
> 
> sometimes the following messages appear in /var/log/messages:
> 
>         May 13 14:24:41 sunny kernel: PCI: Found IRQ 10 for 
> device 00:0e.0
>         May 13 14:24:41 sunny kernel: PCI: The same IRQ used 
> for device 00:0a.0
> 
> "0e" is my PCI sound card, and "0a" is my PCI ethernet card. 
> The messages apppear in
> the following environment: I send from another linux machine 
> (per ssh) a command
> wich plays some sound on my sound card, therefore the eth0 
> event and the sound
> event occur at almost the same time.
> 
> Question: Can I ignore these messages, or is there any buggy 
> behaviour?
> 
> Regards
> 
> 
> Joachim Backes
> 
> --
> 
> Joachim Backes <backes@rhrk.uni-kl.de>       | Univ. of Kaiserslautern
> Computer Center, High Performance Computing  | Phone: 
> +49-631-205-2438 
> D-67653 Kaiserslautern, PO Box 3049, Germany | Fax:   
> +49-631-205-3056 
> ---------------------------------------------+------------------------
> WWW: http://hlrwm.rhrk.uni-kl.de/home/staff/backes.html  
> 
> -
> To unsubscribe from this list: send the line "unsubscribe 
> linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
> 

Re: IRQ usage for PCI devices, Kernel 2.4.4

[Alan Cox]

>         May 13 14:24:41 sunny kernel: PCI: Found IRQ 10 for device 00:0e.0
>         May 13 14:24:41 sunny kernel: PCI: The same IRQ used for device 00:0a.0
> "0e" is my PCI sound card, and "0a" is my PCI ethernet card. The messages apppear in
> the following environment: I send from another linux machine (per ssh) a command
> wich plays some sound on my sound card, therefore the eth0 event and the sound
> event occur at almost the same time.
> 
> Question: Can I ignore these messages, or is there any buggy behaviour?

This is debugging messages - you can ignore them. PCI supports IRQ sharing