[PATCH 4/4] kvmppc: convert wrteei to wrtee as kvm guest optimization

Kumar Gala galak at kernel.crashing.org
Thu Aug 21 23:41:10 EST 2008

On Aug 19, 2008, at 5:36 AM, ehrhardt at linux.vnet.ibm.com wrote:

> From: Christian Ehrhardt <ehrhardt at linux.vnet.ibm.com>
> Dependent on the already existing CONFIG_KVM_GUEST config option  
> this patch
> changes wrteei to wrtee allowing the hypervisor to rewrite those to  
> nontrapping
> instructions. Maybe we should split the kvm guest otpimizations in  
> two parts
> one for the overhead free optimizations and on for the rest that  
> might add
> some complexity for non virtualized execution (like this one).
> Signed-off-by: Christian Ehrhardt <ehrhardt at linux.vnet.ibm.com>
> ---

So this commit message doesnt explain why 'wrtee' facilities doing  
whatever optimization and 'wrteei' doesnt.

- k

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