linux-kernel - Re: [PATCH] cpuidle/powernv : init all present cpus for deep states

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Message-Id: <20180524065345.yuqb76aerxjnn3pk@aksadiga.ibm>
Date:   Thu, 24 May 2018 12:23:45 +0530
From:   Akshay Adiga <akshay.adiga@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Cc:     npiggin@...il.com, ego@...ux.vnet.ibm.com, mpe@...erman.id.au
Subject: Re: [PATCH] cpuidle/powernv : init all present cpus for deep states

On Wed, May 16, 2018 at 05:32:14PM +0530, Akshay Adiga wrote:
> Init all present cpus for deep states instead of "all possible" cpus.
> Init fails if the possible cpu is gaurded. Resulting in making only
> non-deep states available for cpuidle/hotplug.
> 
> Signed-off-by: Akshay Adiga <akshay.adiga@...ux.vnet.ibm.com>
> ---
>  arch/powerpc/platforms/powernv/idle.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c
> index 1f12ab1..1c5d067 100644
> --- a/arch/powerpc/platforms/powernv/idle.c
> +++ b/arch/powerpc/platforms/powernv/idle.c
> @@ -79,7 +79,7 @@ static int pnv_save_sprs_for_deep_states(void)
>  	uint64_t msr_val = MSR_IDLE;
>  	uint64_t psscr_val = pnv_deepest_stop_psscr_val;
> 
> -	for_each_possible_cpu(cpu) {
> +	for_each_present_cpu(cpu) {
>  		uint64_t pir = get_hard_smp_processor_id(cpu);
>  		uint64_t hsprg0_val = (uint64_t)paca_ptrs[cpu];
> 
> @@ -814,7 +814,7 @@ static int __init pnv_init_idle_states(void)
>  		int cpu;
> 
>  		pr_info("powernv: idle: Saving PACA pointers of all CPUs in their thread sibling PACA\n");
> -		for_each_possible_cpu(cpu) {
> +		for_each_present_cpu(cpu) {
>  			int base_cpu = cpu_first_thread_sibling(cpu);
>  			int idx = cpu_thread_in_core(cpu);
>  			int i;
> -- 
> 2.5.5
>

Missed CC'ing to  mpe@...erman.id.au