Re: [PATCH] mm: rename and document alloc_pages_exact_node

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On 21/07/2015 15:55, Vlastimil Babka wrote:
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 2d73807..a8723a8 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -3158,7 +3158,7 @@ static struct vmcs *alloc_vmcs_cpu(int cpu)
>  	struct page *pages;
>  	struct vmcs *vmcs;
>  
> -	pages = alloc_pages_exact_node(node, GFP_KERNEL, vmcs_config.order);
> +	pages = alloc_pages_prefer_node(node, GFP_KERNEL, vmcs_config.order);
>  	if (!pages)
>  		return NULL;
>  	vmcs = page_address(pages);

Even though there's a pretty strong preference for the "right" node,
things can work if the node is the wrong one.  The order is always zero
in practice, so the allocation should succeed.

Paolo
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