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Re: [PATCH] x86/cpuidle: allocate processor_powers[] dynamically
- To: Jason Andryuk <jason.andryuk@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 9 Nov 2026 08:16:48 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>, Roger Pau Monné <roger@xxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Mon, 09 Nov 2026 07:16:54 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 07.11.2026 00:36, Jason Andryuk wrote:
> On 2026-11-03 07:52, Jan Beulich wrote:
>> @@ -1694,6 +1702,15 @@ static int __init cf_check cpuidle_presm
>> if ( !xen_cpuidle )
>> return 0;
>>
>> + processor_powers = xvzalloc_array(struct acpi_processor_power *,
>> + nr_cpu_ids);
>> + if ( !processor_powers )
>> + {
>> + printk("CPUIDLE: disabled - not enough memory\n");
>> + xen_cpuidle = 0;
>> + return -ENOMEM;
>> + }
>> +
>> mwait_idle_init(&cpu_nfb);
> mwait-idle.c accesses processor_powers[], too, but that should not be
> accessible since we don't make it into mwait_idle_init()?
Indeed.
> If so:
> Reviewed-by: Jason Andryuk <jason.andryuk@xxxxxxx>
Thanks.
Jan
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