On Wed, 23 Sep 2009, Tejun Heo wrote: > On ia64, the first chunk is fixed at PERCPU_PAGE_SIZE. It's something > hardwired into the page fault logic and the linker script. Build will > fail if the static + reserved area goes over PERCPU_PAGE_SIZE and in > that case ia64 will need to update the special case page fault logic > and increase PERCPU_PAGE_SIZE. The area reserved above is interim > per-cpu area for cpu0 which is used between head.S and proper percpu > area setup and will be ditched once initialization is complete. You did not answer my question. The local percpu variables are accessed via a static per cpu virtual mapping. You cannot place per cpu variables outside of that virtual address range of PERCPU_PAGE_SIZE. What happens if the percpu allocator allocates more data than available in the reserved area? -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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