Messages in this thread | | | Date | Tue, 20 Nov 2007 12:58:34 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: [rfc 08/45] cpu alloc: x86 support |
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On Tue, 20 Nov 2007, Andi Kleen wrote:
> > > This limitation shouldn't apply to the percpu area, since gs_base can be > > pointed anywhere in the address space -- in effect we're always indirect. > > The initial reference copy of the percpu area has to be addressed by > the linker.
Right that is important for the percpu references that can be folded by the linker in order to avoid address calculations.
> Hmm, in theory since it is not actually used by itself I suppose you could > move it into positive space.
But the positive space is reserved for a processes memory.
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