| From | Rusty Russell <> | Subject | Re: [patch 01/41] cpu_alloc: Increase percpu area size to 128k | Date | Tue, 3 Jun 2008 09:48:25 +1000 |
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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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