Re: [PATCH] i386 CPU hotplug updated for -mm

[Pavel Machek]

Hi!


> +#ifdef CONFIG_HOTPLUG_CPU
> +#include <asm/nmi.h>
> +/* We don't actually take CPU down, just spin without interrupts. */
> +static inline void play_dead(void)
> +{
> +	/* Ack it */
> +	__get_cpu_var(cpu_state) = CPU_DEAD;
> +
> +	/* We shouldn't have to disable interrupts while dead, but
> +	 * some interrupts just don't seem to go away, and this makes
> +	 * it "work" for testing purposes. */
> +	/* Death loop */
> +	while (__get_cpu_var(cpu_state) != CPU_UP_PREPARE)
> +		cpu_relax();
> +
> +	local_irq_disable();
> +	__flush_tlb_all();
> +	cpu_set(smp_processor_id(), cpu_online_map);
> +	enable_APIC_timer();
> +	local_irq_enable();
> +}
> +#else

Having real implementation of this one would be very welcome for
suspend-to-{RAM,disk} on smp machines....

Are there really no i386 machines whose hardware supports hotplug?

							Pavel
-- 
People were complaining that M$ turns users into beta-testers...
...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl!
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