Re: [patch] kvm: fix GFP_KERNEL allocation in atomic section in kvm_dev_ioctl_create_vcpu()

[Avi Kivity]

Ingo Molnar wrote:
> Subject: [patch] kvm: fix GFP_KERNEL allocation in atomic section in kvm_dev_ioctl_create_vcpu()
> From: Ingo Molnar <mingo@xxxxxxx>
>
> fix a GFP_KERNEL allocation in atomic section bug: 
> kvm_dev_ioctl_create_vcpu() called kvm_mmu_init(), which calls 
> alloc_pages(), while holding the vcpu. The fix is to set up the MMU 
> state earlier, it does not require a loaded CPU state.
>   

Yes it does.  It calls nonpaging_init_context() which calls 
vmx_set_cr3() which promptly trashes address space of the VM that 
previously ran on that vcpu (or, if there were none, logs a vmwrite error).

--
error compiling committee.c: too many arguments to function

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