[ale] interrupts in linux??

[Christopher Bergeron]

So then, in theory, I should be able to assign any IRQ that isn't being 
used (like my floppy ide channel for example), and assign it to one of 
these devices?

Thanks more..
-CB



Geoffrey wrote:

> Generally, if the device drivers are loaded via a module, you pass it 
> as an arg to the module (irq=7).  If it's built into the kernel, you 
> pass it to the kernel on the boot command line, or add it to the boot 
> loader (lilo,grub) config file.  For lilo, you use the 'append' arg.  
> I don't know about grub.  I can manipulate some irq assignment via the 
> bios as well, but that's always looked a lot like black magic, mirrors 
> and blue smoke to me...
>
> Christopher Bergeron wrote:
>
>> Not yet, but I'd like to "nip any problems in the bud" if I can.  So 
>> far, everything is working fine; stress on "so far".  I just 
>> remastered the box, so I haven't really put it through it's paces 
>> yet, though...
>>
>> How can I change the interrupts that have been assigned?  I'm not 
>> using a floppy drive at all, so I could steal one from there...
>>
>> Any ideas?
>> -CB
>>
>>
>> Geoffrey wrote:
>>
>>> Yes you can, but it depends a lot on the devices themselves and 
>>> their associated drivers.
>>>
>>> I don't know that I'd want to have my nic, sound and vga on the same 
>>> irq, that would seem to be getting a bit crowded.
>>>
>>> So, are you seeing any problems?
>>>
>>> Christopher Bergeron wrote:
>>>
>>>> Can any hardware guru's tell me if it's okay to share an interrupt 
>>>> in linux?  I remember back in the DOS/Win days that you couldn't 
>>>> have a device on the same interrupt (serial ports, etc)...  but 
>>>> that was back before PCI, PNP, etc...  I've got 3 devices on the 
>>>> same interrupt as follows:
>>>> [root at proto1 root]$ lspci -v
>>>>
>>>> (edited for brevity)
>>>>
>>>> 00:0d.0 Network controller: Harris Semiconductor Prism 2.5 Wavelan 
>>>> chipset (rev 01)
>>>>        Subsystem: Unknown device 1737:3874
>>>>        Flags: bus master, medium devsel, latency 32, IRQ 11
>>>>        Memory at d8008000 (32-bit, prefetchable) [size=4K]
>>>>        Capabilities: [dc] Power Management version 2
>>>>
>>>> 00:11.0 Multimedia audio controller: Yamaha Corporation YMF-744B 
>>>> [DS-1S Audio Controller] (rev 02)
>>>>        Subsystem: Yamaha Corporation DS-XG PCI Audio CODEC
>>>>        Flags: bus master, medium devsel, latency 32, IRQ 11
>>>>        Memory at d8000000 (32-bit, non-prefetchable) [size=32K]
>>>>        I/O ports at d000 [size=64]
>>>>        I/O ports at d400 [size=4]
>>>>        Capabilities: [50] Power Management version 1
>>>>
>>>> 01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 
>>>> AGP (rev 04) (prog-if 00 [VGA])
>>>>        Subsystem: Matrox Graphics, Inc. Millennium G400 MAX/Dual 
>>>> Head 32Mb
>>>>        Flags: bus master, medium devsel, latency 32, IRQ 11
>>>>        Memory at d2000000 (32-bit, prefetchable) [size=32M]
>>>>        Memory at d4000000 (32-bit, non-prefetchable) [size=16K]
>>>>        Memory at d5000000 (32-bit, non-prefetchable) [size=8M]
>>>>        Expansion ROM at <unassigned> [disabled] [size=64K]
>>>>        Capabilities: [dc] Power Management version 2
>>>>        Capabilities: [f0] AGP version 2.0
>>>>
>>>>
>>>> Is this okay?  Or do I have a problem here? Thanks in advance for 
>>>> replies...
>>>> -CB
>>>>
>>>>
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>>>>
>>>
>>
>>
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>


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