Messages in this thread | | | Date | Thu, 9 Feb 2006 17:13:31 +0100 | From | Heiko Carstens <> | Subject | Re: [PATCH] percpu data: only iterate over possible CPUs |
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> > Presumably not all architectures are doing that. > powerpc/ppc64, for instance, determines the number of possible cpus > from information exported by firmware (and I'm mystified as to why > other platforms don't do this). So it's typical to have a kernel an a > pSeries partition with NR_CPUS=128, but cpu_possible_map = 0xff.
Simply because there is no such interface on s390. The only thing we know for sure is that if we are running under z/VM the user is free to configure up to 63 additional virtual cpus on the fly...
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