Re: [PATCH] kvm_vm_ioctl_get_dirty_log restore "nothing dirty" optimization

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Rusty Russell wrote:
> kvm_vm_ioctl_get_dirty_log scans bitmap to see it it's all zero, but
> doesn't use that information.
>
> Avi says:
> 	Looks like it was used to guard	kvm_mmu_slot_remove_write_access();
> 	optimizing the case where the guest just leaves the screen alone (which
> 	it usually does, especially in benchmarks).
>
> 	I'd rather reinstate that optimization.  See
> 	66d8a4e4d4bd470216028daabb9d887b73259c96 where the damage was done.
>
> It's pretty simple: if the bitmap is all zero, we don't need to do anything to
> clean it.
>
>   

Applied; thanks.

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


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