RE: [patch 01/41] cpu_alloc: Increase percpu area size to 128k

Christoph Lameter
2008-06-10T17:22:53Z

On Mon, 2 Jun 2008, Luck, Tony wrote:

> > The per cpu allocator requires more per cpu space and we are already near
> > the limit on IA64. Increase the maximum size of the IA64 per cpu area from
> > 64K to 128K.
>
> > -#define PERCPU_PAGE_SHIFT 16 /* log2() of max. size of per-CPU area */
> > +#define PERCPU_PAGE_SHIFT 17 /* log2() of max. size of per-CPU area */
>
> Don't you need some more changes to the alt_dtlb_miss handler in
> ivt.S for this to work? 128K is not a supported pagesize on any
> processor model.

Ok so this needs to be 18?