Re: [patch] Fix large MCA bootmem allocation

[Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>]

Russ Anderson wrote:
> The MCA code allocates bootmem memory for NR_CPUS, regardless
> of how many cpus the system actually has.

So... how about using num_possible_cpus() instead?

> @@ -1762,11 +1762,8 @@ format_mca_init_stack(void *mca_data, un
>  /* Caller prevents this from being called after init */
>  static void * __init_refok mca_bootmem(void)
>  {
> -	void *p;
> -
> -	p = alloc_bootmem(sizeof(struct ia64_mca_cpu) * NR_CPUS +
> -	                  KERNEL_STACK_SIZE);
> -	return (void *)ALIGN((unsigned long)p, KERNEL_STACK_SIZE);
> +	return __alloc_bootmem(sizeof(struct ia64_mca_cpu),
> +	                    KERNEL_STACK_SIZE, 0);
>  }
>  
>  /* Do per-CPU MCA-related initialization.  */

i.e.
p = alloc_bootmem(sizeof(struct ia64_mca_cpu) * num_possible_cpus() +
	                  KERNEL_STACK_SIZE);

Thanks,
H.Seto