Re: [PATCH v7 8/8] x86/tlb: just do tlb flush on one of siblingsof SMT

[Alex Shi]

On 05/24/2012 05:46 PM, Jan Beulich wrote:

>>>> On 24.05.12 at 11:27, Alex Shi <alex.shi@xxxxxxxxx> wrote:
>> On 05/24/2012 04:42 PM, Peter Zijlstra wrote:
>>
>>> On Thu, 2012-05-24 at 16:32 +0800, Alex Shi wrote:
>>>> So, I use cpumask_t in stack.
>>>
>>> cpumask_t is 512 bytes with NR_CPUS=4096, that's generally considered
>>> too big to be on stack.
>>
>>
>> I am not consistent with cpumask_t.
>> I just want to know why it is too big on stack? Since if it causes
>> trouble in using, that mean current kernel will fail to run on 4096 CPU
>> system.
> 
> Why? Did you spot critical left-over instances of on-stack
> cpumask_t-s anywhere?


I aware it is a stupid question just after the e-mail sent out.
Thanks for you and PeterZ's nice reply!

> 
> Jan
> 


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