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    SubjectRe: [patch 01/41] cpu_alloc: Increase percpu area size to 128k
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    On Tuesday 03 June 2008 03:58:17 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.

    Yes, this was one of the issues with IA64 and extending the per-cpu area.
    It's probable that the IA64 TLB nailing trick might have to give way for
    dynamic per-cpu...

    Rusty.


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