On Fri, Aug 31, 2007 at 04:26:50AM +0100, Hugh Dickins wrote:
> --- 2.6.23-rc4/init/main.c
> +++ linux/init/main.c
> @@ -397,10 +397,6 @@ static void __init smp_init(void)
> {
> unsigned int cpu;
>
> -#ifndef CONFIG_HOTPLUG_CPU
> - cpu_possible_map = cpu_present_map;
> -#endif
> -
>
On Fri, 31 Aug 2007, Hugh Dickins wrote:
>
> So stay safe for now and just revert those #ifndef CONFIG_HOTPLUG_CPU
> optimizations in rc1's commit.
Thanks for the debugging, applied.
Linus
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Alexey Dobriyan reports that maxcpus=1 is still broken in 2.6.23-rc4:
if CONFIG_HOTPLUG_CPU is not set, x86_64 bootup oopses in show_stat() -
for_each_possible_cpu accesses a per-cpu area which was never set up.
Alexey identified commit 61ec7567db103d537329b0db9a887db570431ff4
(ACPI: boot correctl
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