Message-ID: <4ABBD76D.6050308@redhat.com>
Date: Thu, 24 Sep 2009 10:32:45 -1000
From: Zachary Amsden <zamsden@redhat.com>
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To: Marcelo Tosatti <mtosatti@redhat.com>
CC: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
       Avi Kivity <avi@redhat.com>
Subject: Re: [PATCH: kvm 3/6] Fix hotadd of CPUs for KVM.
References: <1253762945-5750-1-git-send-email-zamsden@redhat.com> <1253762945-5750-2-git-send-email-zamsden@redhat.com> <1253762945-5750-3-git-send-email-zamsden@redhat.com> <20090924155224.GC14102@amt.cnet>
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On 09/24/2009 05:52 AM, Marcelo Tosatti wrote:
>
>> +static __cpuinit int vmx_cpu_hotadd(int cpu)
>> +{
>> +	struct vmcs *vmcs;
>> +
>> +	if (per_cpu(vmxarea, cpu))
>> +		return 0;
>> +
>> +	vmcs = alloc_vmcs_cpu(cpu);
>> +	if (!vmcs)
>> +		return -ENOMEM;
>> +
>> +	per_cpu(vmxarea, cpu) = vmcs;
>> +
>> +	return 0;
>> +}
>>      
> Have to free in __cpuexit?
>
> Is it too wasteful to allocate statically with DEFINE_PER_CPU_PAGE_ALIGNED?
>    

Unfortunately, I think it is.  The VMX / SVM structures are quite large, 
and we can have a lot of potential CPUs.

Zach
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