RE: [RFT][PATCH] i386 per cpu IDT (2.6.12-rc1-mm1)

[Nakajima, Jun]

Zwane Mwaikambo wrote:

Zwane, Hi

> Apologies for the long periods between updates, i've been doing some
> relocating.
> 
> Changes since last post:
> 
> * Current interrupt handling domain is still on a node basis,
> although i 
> have moved over to dynamically allocated per cpu IDTs.

I think it might be better if you define some cpu group where the cpus
share the same IDT. Then you can handle big SMP machines as well; it's a
kind of software partitioning limited to I/O device interrupts. That
will be helpful for virtulization like Xen.

> 
> * MSI now allocates vectors per node too, i've introduced a policy
> whereupon the node its allocated on depends on where the code is
> running. 
> I'd like to move towards a policy where we allocate the vector on the
> node 
> the bus/device belongs to, objections? This code is totally untested
> as i 
> don't have any MSI capable devices.
> 
> Thanks,
> 	Zwane
> 

Jun
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Intel Open Source Technology Center
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