Re: [PATCH 09/22] [SCSI] mpt2sas, mpt3sas: Added a support to set cpu affinity for each MSIX vector enabled by the HBA

[Sreekanth Reddy]

>> @@ -1609,6 +1611,10 @@ _base_request_irq(struct MPT3SAS_ADAPTER *ioc, u8
>> index, u32 vector)
>>       reply_q->ioc = ioc;
>>       reply_q->msix_index = index;
>>       reply_q->vector = vector;
>> +
>> +     if (!zalloc_cpumask_var(&reply_q->affinity_hint, GFP_KERNEL))
>> +             return -ENOMEM;
>
> I think this will create the problem Alex Thorlton just reported
> with lpfc on a system with a huge number (6144) of CPUs.
>
> See this thread:
>         [BUG] kzalloc overflow in lpfc driver on 6k core system

Oh ok, Then I will use alloc_cpumask_var() API and cpumask_clear() to
initialize all the CPU bits in the mask to zero. Is it fine?

Regards,
Sreekanth
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