He, Qing wrote:
>
>>> + union {
>>> + struct kvm_ioctl_pic pic;
>>>
>>>
>> Reserve some space here so that other members can be added to the union
>> without changing the ioctl number.
>>
>
> I checked the kvm_ioapic structure, if IOAPIC_NUM_PINS==24, at least 216
> bytes is required (within the union). If reserving space is for possible
> future expansion, how much space do you think is appropriate?
>
>
Well, round up and double we get 512.
--
Do not meddle in the internals of kernels, for they are subtle and quick to
panic.
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