unable to set smp_affinity of PCIe interrupt

unable to set smp_affinity of PCIe interrupt

[Amit Mahadik]

Hello,
????? Following is the output of cat /proc/interrupts
??????????

?????????? CPU0?????? CPU1?????? CPU2

200:?????? 9634????????? 0????????? 0? PCIe0-MSI? eth0


I want to change the processor affinity of the above PCIe interrupt 


By executing command echo 2 > /proc/irq/200/smp_affinity I get the following error

sh: write error: Input/output error

Even after changing the file permissions I have the same problem.

I would like to know how to change the affinity of the above virtual interrupt??

Regards,
Amit.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20130508/bdcce6c6/attachment-0001.html 

unable to set smp_affinity of PCIe interrupt

[Mulyadi Santosa]

On Wed, May 8, 2013 at 7:05 PM, Amit Mahadik <amitmahadik35@yahoo.com> wrote:
> Hello,
>       Following is the output of cat /proc/interrupts
>
>            CPU0       CPU1       CPU2
>
> 200:       9634          0          0  PCIe0-MSI  eth0
>
> I want to change the processor affinity of the above PCIe interrupt
>
> By executing command echo 2 > /proc/irq/200/smp_affinity I get the following
> error
>
> sh: write error: Input/output error
>
> Even after changing the file permissions I have the same problem.

AFAIK, even if you change that file's permission, actually it stays
the same. So you need to switch into root or use sudo to change the
affinity


-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com