On 05/12, Andi Kleen wrote:
>
> --- linux-2.6.21-git2-net.orig/kernel/cpu.c
> +++ linux-2.6.21-git2-net/kernel/cpu.c
> @@ -26,6 +26,10 @@ static __cpuinitdata RAW_NOTIFIER_HEAD(c
> */
> static int cpu_hotplug_disabled;
>
> +/* Contains any CPUs that were ever online at some point.
> + No guarantee they were fully initialized though */
> +cpumask_t cpu_everonline_map;
> +
> #ifdef CONFIG_HOTPLUG_CPU
>
> /* Crappy recursive lock-takers in cpufreq! Complain loudly about idiots */
> @@ -212,6 +216,8 @@ static int __cpuinit _cpu_up(unsigned in
> if (cpu_online(cpu) || !cpu_present(cpu))
> return -EINVAL;
>
> + cpu_set(cpu, cpu_everonline_map);
> +
This also allows us to de-uglify workqueue.c a little bit, it uses
a home-grown cpu_populated_map.
Oleg.
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