tagging freebios2 tree

Eric W. Biederman ebiederman at lnxi.com
Tue Nov 2 18:45:01 CET 2004

Li-Ta Lo <ollie at lanl.gov> writes:

> On Tue, 2004-08-24 at 19:07, Eric W. Biederman wrote:
> > No quite I put the cpu_info structure at the bottom of the stack,
> > and this function looks it up.
> > 
> > The same idea has been used in the kernel for quite a while.  
> > 
> > Basically this allows me to preallocate some per cpu information
> > and to pass that into cpu_initialize from another cpu.
> > 
> > The linux kernel has been doing something similar for quite a while.
> > 
> Does cpu_info() return different value depends on which CPU it is 
> running ?

Yes.  The stack is per cpu and it returns a fixed address from
the stack structure.

 > Are the data structures per CPU or shared between CPUs ?

per-cpu.  Which is the point.


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