Christoph Lameter wrote: > On Wed, 23 Sep 2009, Tejun Heo wrote: > >> any special handling. What problems are you seeing? > > per cpu variable access on IA64 does not use the percpu_offset for the > calculation of the current per cpu data area. Its using a virtual mapping. > > How does the new percpu allocator support this? Does it use different > methods of access for static and dynamic percpu access? That's only when __ia64_per_cpu_var() macro is used in arch code which always references static perpcu variable in the kernel image which falls inside PERCPU_PAGE_SIZE. For everything else, __my_cpu_offset is defined as __ia64_per_cpu_var(local_per_cpu_offset) and regular pointer offsetting is used. Thanks. -- tejun -- 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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