Re: broken local_t on i386

[Christoph Lameter]

On Mon, 12 Jun 2006, Andi Kleen wrote:

> It does, but the per cpu data that everybody uses doesn't reside in the PDA
> because it wasn't possible to make this work with binutils
> 
> It would require a relocation relative to another symbol which isn't
> really supported.

I dont think you need a relocation relative to another symbol. Map the 
pda to a virtual adress range. That is then translated with a 
processor specific page table to various physical addresses.

> At some point I considered using runtime patching to work around
> this limitation, but it would be some work and relatively complex.

Well this would drastically decreased the overhead for PDA access and fix 
local.t
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