Xen devel - Jul 2012 - Re: [Qemu-devel] [PATCH 3/4] exec, memory: Call to xen_modified_memory.

On 19/07/12 12:50, Avi Kivity wrote:
> On 07/19/2012 02:41 PM, Anthony PERARD wrote:
>> On 17/07/12 19:36, Stefano Stabellini wrote:
>>> On Tue, 17 Jul 2012, Avi Kivity wrote:
>>>> How about pushing the call into
cpu_physical_memory_set_dirty_flags()?
>>>> Would that reduce the number of call sites?
>>>
>>> Pushing the calls to cpu_physical_memory_set_dirty_flags and
>>> cpu_physical_memory_set_dirty_range would make the code much nicer.
>>> However being these functions in exec-obsolete.h, are they at risk
of
>>> removal?
>>
>> I thought about it, but when I saw that set_dirty were called only when
>> it was not already set as dirty where the call seams to be necessary.
>>
>> I just try to call xen_modified_mem only within
>> cpu_phy_mem_set_dirty_flags but it does not work, even when I tried to
>> clear the dirtybits. But I maybe don''t do the right thing yet
to clear
>> the dirty bits
>
> You can wrap the if (not dirty) make_it_dirty() sequence in a helper,
> and insert your hypercall in the helper, unconditionally.
Ok, I''ll do that.

Thanks,

-- 
Anthony PERARD