Messages in this thread | | | Date | Tue, 21 Dec 2021 14:15:56 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH 13/17] kernel/cpu: add num_possible_cpus counter |
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On Sat, Dec 18, 2021 at 01:20:09PM -0800, Yury Norov wrote: > Similarly to the online cpus, the cpu_possible_mask is actively used > in the kernel. This patch adds a counter for possible cpus, so that > users that call num_possible_cpus() would know the result immediately, > instead of calling the bitmap_weight for the mask underlying.
So what user actually cares about performance here enough to warrant this?
> +EXPORT_SYMBOL(set_cpu_possible);
NAK
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