On Thu, Jul 12, 2007 at 11:58:06PM -0700, Christoph Lameter wrote:
> cpu_core_map is currently an array defined using NR_CPUS. This means that
> we overallocate since we will rarely really use the maximum
> number of configured cpus. This may become a problem when we need to
> increase the NR_CPUs on x86_64 for our new product line.
>
> If we put the cpu_core_map into the per cpu area then it will be allocated
> for each processor as it comes online.
>
> However, this means that the core map cannot be accessed until the per cpu
> area has been allocated. Xen does a weird thing here looping over all
> processors and zeroing the masks that are not yet allocated and that will
> be zeroed when they are allocated. I commented the code out. Maybe there
> is another purpose? Jeremy?
Is there a reason why cpu_sibling_map[] is left out in these changes?
thanks,
suresh
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