[PATCH] [POWERPC] Support setting affinity for U3/U4 MSI sources

[Michael Ellerman]

On Mon, 2007-09-17 at 15:12 -0500, Olof Johansson wrote:
> Hook up affinity-setting for U3/U4 MSI interrupt sources.
> 
> Tested on Quad G5 with myri10ge.

And a JS21 blade:

# echo 1 > /proc/irq/21/smp_affinity 
# cat /proc/interrupts 
           CPU0       CPU1       
 21:        126        375  MPIC-U3MSI Edge      eth1
# ping -c 1000 -f cradle
1000 packets transmitted, 1000 received, 0% packet loss, time 135ms
# cat /proc/interrupts 
           CPU0       CPU1       
 21:       2153        375  MPIC-U3MSI Edge      eth1
# echo 2 > /proc/irq/21/smp_affinity 
# cat /proc/interrupts 
           CPU0       CPU1       
 21:       2174        379  MPIC-U3MSI Edge      eth1
# ping -c 1000 -f cradle
1000 packets transmitted, 1000 received, 0% packet loss, time 138ms
# cat /proc/interrupts 
           CPU0       CPU1       
 21:       2174       2389  MPIC-U3MSI Edge      eth1


Acked-by: Michael Ellerman <michael at ellerman.id.au>

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person
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